Best advice for a friend

What’s the best advice to give a friend that has a baby but her boyfriend/ father of baby won’t let her leave the house without him except if it’s to a doctors appointment, or mommy and me? She says he’s a good dad but honestly it just sounds like he’s very insecure and extremely controlling. I’m pregnant and I have another friend who has a baby and we always try to hang with her with the babies and have them do a play date but because he doesn’t like me or my other friend, she’s stuck at home. I just feel so bad for her because she’s obviously going through postpartum but he doesn’t believe her and doesn’t let her leave. He thinks she’s going to go party and because he doesn’t like us doesn’t let us hang out with her. It’s gotten to the point where she won’t even bring up plans we invite her to because she knows the answer is no. It’s like a part of me feels bad but another part of me feels like she’s somewhat choosing this?