I'm not going to let my wife screw up her career for my stepdaughter.

I am married to a woman named Sarah. We met when she was 42 years old and I was 41. Sarah has 2 daughters from another relationship, Nicole, who is now 20 years old and Amy, who is now 18 years old. Amy is disabled. She is wheelchair bound and has a number of issues, some genetic. What you need to know about her is that she needs one on one care at all times. Sarah and I both work with Amy in the week, Sarah nurses and I am a teacher. We take turns looking after Amy on the weekends and at night.<br><br>There's another piece to this story. Nicole. Nicole cannot look after Amy. She tried, and she failed, badly. When she was 17, she tried to care for Amy on her own and she didn't check her for 8 hours. Amy was in agony. The hospital said that Amy would have complications for the rest of her life because of this. Amy cannot be left with Nicole. I cannot have Amy left alone with Nicole. I cannot have Amy left alone with anyone. Nicole can't be trusted with Amy, Amy can't be left with anyone, period.<br><br>Nicole's birthday was on a weekday this year. She turned 20, big deal, it's her birthday, she's supposed to have the day of her life, except she didn't, because she had to look after Amy, because I am teaching, and Sarah is nursing. She was sad, but she sucked it up. Until Sarah said she would make it up to her by taking them both to Paris on the weekend. Nicole was excited, Amy cannot go to Paris. She cannot fly. It's too painful, too difficult, and too hard. I argued with Sarah, but she wouldn't back down. So, I told Nicole and Amy that the trip was off, and explained why. I told Nicole that she would have to help me look after Amy. She was annoyed, understandably. <br><br>A fight ensued between me and Sarah. She told me that I was being unreasonable, that Amy is a *burden*, that Amy can just be dumped on anyone, because Sarah was going to Paris. <br><br>No. Amy cannot be dumped on anyone. She needs me, or Sarah. I am not dumping her on anyone, and I'm not letting my career suffer because my wife wants to screw around in Paris. She's angry with me, Nicole is angry with me, and Amy doesn't know any of this is going on.<br><br>Amy is my *child*. She is my responsibility. She depends on me and Sarah. She cannot be left to go and have fun. <br><br>Nicole and Sarah are being so hard on me right now. I don't know what to do.<br><br>Amy, if you're reading this, I love you so much, and you're not a burden.