Please Read! It is driving me nuts !!

Alright ladies this is a long story so bare with me 😫😂 so recently my boyfriends sister gave birth almost about a week ago. She announced her pregnancy in October and now since she had her baby girl my boyfriend has been super obsessed with her to a point where it’s weirding my parents and myself out ! To start off..he was there a lot at the hospital with his mom just waiting for the baby to be born unlike his other 3 brothers. Then once she was born he visited his sister and she asked him if he wanted to hold her so I thought okay that’s a natural normal thing to do. A few days pass and his sister comes to visit at his family’s house so then his sister only asked him to hold the baby once again. Also, his other 3 brothers don’t really care about the baby as much as he does. They never want to hold her or watch her like my boyfriend does. A few minutes pass and I see him offering to feed her..while I was watching him I could see this look in his eyes almost as if he was deeply in love with this baby. So I’m thinking alright he’s just a really loving uncle and he adores children. NO. a couple more days pass and my mom sends me this picture his mother sent her of my boyfriends baby picture right next to his sisters baby. Now me and my mom are weirded out by this and then his mom even goes the extra mile to send another picture of my boyfriend feeding the baby like it’s his. getting into the technical parts here: my boyfriend has light skin, green eyes and dark hair. The sister has light skin,green eyes and dark hair. Her baby daddy is very dark and has brown eyes and curly hair. This baby looks nothing like a mixed child and has colored eyes already with straight dark hair. So I look up the chances of having a colored eyed baby with a brown eyed person and it’s a low of 37%. I know it’s very hard to tell when they are just born with eyes and skin color but the chances of all of that is very strange. Now adding in some more details about this is her baby daddy is a very bad manipulative person. The whole family dislikes him and how bad he treats my boyfriends sister. my boyfriend keeps getting upset over his sister being with that guy and staying at his place. He’s constantly getting mad about it,talking about it and also wanting to speak up to the guy unlike his other 3 brothers or his dad!! I mean come on why is he the only one getting defensive.

Keep in mind that I’m in college and stay in the dorm from September to May. I only came home on the weekends and his sister got pregnant in October when they had to stay in a very small hotel room for a while. I remember one day he told me everytime I see my sister I can see her nipples through her shirt. Why would he even be looking at that?! It disgusted me when I heard that and his family is also one for touching like his mom will smack his ass right in front of me. Even in pictures of him and his sister in December she’s holding him like she would a boyfriend/husband she never did that previous times before. Idk it’s really gross to me because I never experienced this is in my life. My mom and I have came to the thought of the baby might be his. Yes incest I don’t want to think it’s possible it might not even be but somethings about this situation is weirding my parents and myself out. He’s really acting like this baby is his and I’m not gonna lie it does resemble him a tiny bit. The way he’s acting with this baby and wanting to support his sister. I told him the other day why are you acting like you’re the father ? It’s weird you shouldn’t be worrying this much about your sister why is no one else except you ? He just stood quiet and didn’t say anything back. PLEASE I WOULD LOVE TO HEAR SOME RESPONSES THIS IT WOULD MEAN ALOT❤️

UPDATE: some of are you are wondering, they are biological