My(28M) sister(30F) is using our mother's(58F) money to pay for her husband(32M) fertility treatments.

My sister and her husband want to have kids, but they need a surrogate. It is very expensive, and my sister and her husband don't have that sort of money. They make a combined income of $120,000, which is a lot, but not enough for a surrogacy. I keep telling her to take out a loan or something, but she refused and started crying.<br><br>My mom is 58, and she's retired, living off of her retirement and a small inheritance from my grandfather who left her a million dollars when he passed a few years ago. My sister told our mom that she is having trouble conceiving and asked our mother for money. Our mother gave my sister $50k, which is all the money my sister and her husband need for the surrogacy. My mom is no longer a millionaire. <br><br>Since my mom gave my sister the money, my mom has become depressed. She had planned to travel the world but now feels like she can't because she doesn't have much money. She is also worried that she won't have any money to leave for me/my children. I make significantly less than my sister. I make 70k, and she out-earns me. She has been able to save a considerable amount of money, while I have a lot of debt. My mom thinks that my sister is screwing me over by taking her money, leaving me the only money left in her estate.<br><br>I got together with my GF(28) a year ago. My sister and her husband saw how crazy in love we were and asked if we would be the surrogate. I agreed, and my sister was overjoyed. My sister and her husband decided that it would be a closed surrogacy, paid, and with my eggs and her husband's sperm used. They asked that the child not be told they were adopted, and that my mom not tell others that the child is biologically mine. This is getting weird. I was like, sure, I guess. I started having second thoughts when I told my GF about it. She said that this is insane, and that we shouldn't be doing this. I started having second thoughts, and then I decided that maybe my GF was right and that I shouldn't be doing this. My sister was unsurprised when I told her this, and offered to pay me $15,000 if I agreed to do it. I am really tempted. I don't know what to do.<br><br>I decided to put it aside and reminded my sister that our mother was very depressed after giving my sister the money. I asked my sister to try to cheer our mom up. My sister and her husband went out to dinner with our mom and herGF(57F) and my niece(7f). My mom paid for the dinner like always, which is fine I guess, and racked up a $500 bill. Then, my sister started talking about how expensive the surrogacy is, and how they had to get a second mortgage on their house. My mom got up out of shame and went to the bathroom, where she cried. My sister saw her crying and came over to see what was wrong. My mom told her that she feels guilty, because she thinks that she should have saved her money so she could leave money for her grandkids. My sister disagreed and said that it was the right decision because she was leaving money for her "child", and that she was leaving me money as well. I was really fucking mad at this, but held my temper. My mom then accused my sister of taking her money for the surrogacy, and my sister started crying because she felt like our mom didn't want to be a grandma.<br><br>My mom is very upset and will barely speak to my sister or her husband or my niece. They won't leave her alone. My sister keeps calling our mom and visiting our mom, trying to talk to her. All she wants to do is watch tv and read with her GF. My sister is like, "You're always with her! You're never home! I have something I need to talk to you about!" My mom and her GF have been together for a few years, and my mom wants to spend a lot of time with her. She doesn't like it when my sister is always at her house, and my sister's repeated visits are very stressful for my mom. I told my sister to give my mom space and to just leave her alone. My sister said that she was going to, but that our mom needs to get over her depression. I asked how my mom was going to do that if my sister keeps visiting my mom, but my sister denied she was visiting. I told her that my mom needs alone time, and reminded her that my mom gave her the money because she felt bad that my sister was infertile, even though my mom had planned for that money to be for her grandkids.<br><br>My sister started screaming and crying at me and hung up. I got very scared after this and started freaking out. I went outside for a walk to clear my head. It's a bit chilly outside, so I started running and eventually started to sweat and warm up. After a while, I got tired and stopped to catch my breath. I realized that I was a block away from my sister's house. I could see my niece and my sister's husband outside. I was about to go talk to them when I saw my sister come outside, go to her car, and start driving away. I sprinted after her and tried to chase her down, but I was too exhausted and she was too fast. I gave up and sat down on the curb. I sat there for a while, and realized that I had no way of getting home. I walked back to my sister's house, and told my BIL that I didn't have a car and needed a ride. I didn't want to tell him what happened, so I said that I and my sister had planned for me to come over and that she was supposed to pick me up and drive me here. He said that if I had no way to get here, he couldn't drive me home, because he needed to take care of my niece. I got pissed and starting yelling at him, telling him to call my mom or something, because I didn't have a ride and she was supposed to drive me here. He was really scared and my niece started to cry, so he took my niece upstairs. I played bad cop and started destroying stuff until he came back outside and I told him to drive me home or I would call the cops. He was like, "Please do. You're trespassing."<br><br>He called the cops, and they came. I told them that I had no way of getting home and that I needed a ride, and that my BIL wouldn't drive me. The cop decided to take me home. When I got home, I told my GF that I had gotten into a fight with my sister. I asked her what I should do, and she said that I should just let my sister have the money and leave my mom alone. I agreed and said yeah, I'm just going to let it go. Two days later, my mom calls me up and tells me that my sister is not answering her calls. I was like, "That's weird, she usually answers her phone." Then my mom started crying and asked if my sister was mad at her. I didn't know what to say, so I told the truth, that my sister and I had gotten into a fight. My mom thought that my sister was mad at her, and that our fight was about something she said to my niece. My mom started telling me how she thinks that my sister is using her money to finance a normal pregnancy instead of the surrogacy, and how my sister is trying to cut my mom out of her life. I was like, "What? No, my sister is still pregnant with my child." My mom started freaking out at this and asked me "So you're still going to be the surrogate?" and I was like, no, actually, I said no. My mom started celebrating and was like, "I'm so happy that you aren't doing it. I thought that you were, and knowing that you were carrying your sister's child was seriously traumatizing for me."<br><br>I was like, "Wait what? You knew that my sister asked me to be the surrogate?" and my mom was like, "Of course, I knew that your sister couldn't conceive a child." I was shocked. I didn't know that my mom knew that I had agreed to be the surrogate. Then, my mom told me that my sister and her husband had asked my mom's GF to be the surrogate. I was shocked. I started screaming at my mom, asking her why I had to be the surrogate and why my mom's GF could be the surrogate and I couldn't. My mom started crying and telling me that it's not her fault that my sister's husband doesn't find her attractive, and that my sister's husband wanted me to be the surrogate because he found me "fascinatingly beautiful". I started yelling at my mom a lot more now. My GF started trying to calm me down, which only made me angrier. My mom told me that I could continue to be the surrogate if I wanted to, but I told her to fuck off and hung up.<br><br>I told my GF that my mom was doing all of this secretively and that my sister and her husband asked my mom