His female best friend/roommate

Im dating this guy and he has a female best friend who he lives with who's pregnant. I haven't met her yet. I didn't even know she was pregnant until I was video chatting with him and he showed me a video that calls him. It's and ASMR of people eating and I heard a girl yell "TURN THAT OFF BEFORE I GET VIOLENT WITH YOU!!!" He laughed and said she hates the sound of chewing. He wants me to come over tomorrow. I asked will she be there and he said "Most likely unless she gets called into work but she'll probably tell them to fuck themselves". He did tell me she's only a couple months and going through pregnancy depression. I might meet her tomorrow. Maybe I'm being paranoid but what am I supposed to say? Do I try to be friends or just leave her alone? Idk I just don't know a lot of men with female friends and none who live with them.