My sister is 7 months pregnant and is going through a rough patch with her husband. She came to stay with me and my boyfriend for a few days just to get some space.
We live in a 1 bedroom apartment and only have one real bed in our room. We have a really nice cloud couch, but may not be ideal for sleeping every night.
When she arrived, I offered her the couch. She asked if she could sleep in our bed and have us take the couch, just for a few nights. I was about to say yes, but my boyfriend immediately jumped in and said he's not comfortable giving up our bed because he has a physical construction job and deals with back pain.
At the moment, I didn't push and just apologized to her as I didn't want to start a fight with my boyfriend. She said it was fine and was thankful we were letting her stay at our place anyways. In the back of my mind, I knew she was hurt and I caught her crying in the bathroom later which made me feel absolutely horrible.
I had a huge argument with my boyfriend and he said we shouldn't feel guilty since we are letting her stay in our home, but it was my call on whether she slept on the bed or not. My mom found out and she is furious with me saying she's my pregnant sister and she needed comfort from me more than anyone.
Now everyone is mad at me, but I also can't argue with my boyfriend since it's our shared space and we have agreed on certain boundaries in our home.
So...AITA for not making my pregnant sister more of a priority in this situation?