Pregnant friend wants me to convince my boyfriend to let her move into his house

I currently live on my college dorm. My boyfriend owns a home and we have a couple friend. The boyfriend rents a room out in my boyfriend's house and I'm friends with the girlfriend. She lives in her own apartment with 2 roommates. She found out she was pregnant a few months ago and wanted to move in with her boyfriend who again, lives in the house my boyfriend owns with my boyfriend. She wants to move in there because it's a house and she doesn't want to be raising a baby in a 3 bedroom apartment with two other girls living there. So her and her boyfriend asked my boyfriend if she could move in and my boyfriend said no. For two reasons. First reason is he always said he would only get one roommate. He doesn't want 3. The other reason is my boyfriend has made it very clear that he does now want kids ever. So he doesn't want to have to live with a child. And newborns cry a lot and he likes his sleep because he works 50 hours a week. He doesn't want a baby in the house. So he told them no. My friend has been asking me to convince my boyfriend to let her move in and I feel like it's not my place. It's not my house. Not my mortgage. I feel like getting involved could affect our relationship. Not sure what to do.