My Dsis has recently given birth, he's been quite a fussy baby and they think he may have an intolerance. So she's been very tired and stressed. Her DP and his family have made it very clear to her that she should breast feed. She told me today that he guilt trips her into carrying it on and googles it and comes up with a list of why she should do it. She gives in and does it even though she wants to try formula so he can help her. Also today she told me he cancelled their plans today and decided to go out with his friend, leaving her home alone. He did the same yesterday too.
Recently they had a big argument at my parents house and apparently was almost shouting at her. My DM did not step and she should have but text my sister saying he was out of order and she was close to telling him to leave. This argument again was about breastfeeding.
She told me today that he said she couldn't go out with a friend for a couple of drinks and has recently been texting asking where she is. She said he never used to do this before.
My Dsis complains he doesn't help much and he hasn't even bathed him once yet. Calls my Dsis lazy and wants the house in a perfect way otherwise she is lazy. Also i personally feel uncomfortable how he handles his DS sometimes. He hasn't supported his head correctly and thought at 4 weeks old could hold it on his own. He pulls his cheeks around and mouth which it could be cute and funny if done right but he isn't gentle. He has been heavy handed with my son, not on purpose but i just dont think he realises.
AIBU this behaviour is not right? I've been in an abusive relationship before and dont want her to be in my position.