AITA for not giving up my seat to a pregnant woman who just became my stepmom

I f29 have very little family remaining. My father died last year, and I just have my mom left. I have some half-siblings from my mom’s side who I’m closest to but very little contact with my dad’s side. I flew back to my hometown because my aunt is getting her citizenship and I was invited. I didn’t really want to go, it’s a 5 hour flight but my mom kind of guilt tripped me into going. I have been in my hometown for 3 days and on my way back home now.<br><br>I was sitting next to the window in my 2nd flight and there is a man in the aisle. I can’t leave because my emigration documents are in my luggage in the overhead bin and I didn’t want to disturb everyone. A woman stops in the aisle and says she’s 6 months pregnant and wanted to know if I could give up my seat to her, preferably a window seat as it’s closest to the lavatory. I sympathized with her but told her no. She said she understood and appreciated me for considering it. The man in the aisle offered to swap with her. <br><br>When I got off the plane, I saw the man and woman walk hand in hand to the baggage claim. I felt weird but went about my business. I don’t know why but I looked back at them and saw them holding up pictures of my dad and the man in the picture was the man from the plane. I was shocked because I didn’t know my dad was dating before he died. I approached them and just asked why they were holding up pictures of my father. They were both shocked and asked where I came from. I told them the same plane. We talked for a while and they were both very nice. The man asked if he could talk to me in private and the woman agreed that they could. He told me he was my dad’s boyfriend and they’ve been together for almost a year. He asked if I was OK with it and I said yes. I asked when he was gonna tell me that they were together and he said they were planning to in June but my dad had a heart attack before they could and the woman was his daughter who he wanted to introduce as his girlfriend. I was sad for him for not getting the chance to tell me. I was also sad for my dad for not being able to tell me himself. I asked if they were living together and he said yes and showed me the house they lived in. He said my dad was proud of it because it was the first thing he bought when he moved to the US. He said he was gonna live there with me as long as I was alright with it. I said yes and thanked him for taking care of my dad’s house. He said it was beautiful but it was my dad’s home. He told me to come back anytime and visit them. I said yes and we went back to the woman. We talked for a while until they had to go pick up their luggage. I went to pick mine up too and when I came back they were both gone.<br><br>I feel AITA for not giving the woman my seat? She’s now my stepmom and I feel bad for not giving it to her.