Do you think my sister is over doing it?

Me and my fiance been through some shit. It was not easy. I pissed him off he pissed me off.. he shared to his friends what we been going through and I shared to my sister what we went through. It was like a bipolar relationship. It was crazy. We both have a 1 year old together and one on the way. So he's going to be in my life because of those kids. Today he spend time with his daughter... I'm staying at my dad's house for now and my sister lives with him. She was just rude and slamming things and doors because he was there. I understand if you don't like him but why do all of that. He has every right to see his child. She just have this big attitude.

Do you think my sister is over doing it?
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