Need advice

So my husband and I and my 4 month old live with my in-laws/mother in law. I have a weird feeling that my eldest bro in-law doesn’t like me.. I have been married for 2 years now and after my baby was born I felt a switch in my bro in law..

today is Mother’s Day and we all went out with my mother in law and my sis in law and two bro in-laws. But for some reason whenever I try and talk to him direct he kinda brushes it off and is very short with me with a sort of attitude. When something is mentioned regarding me I notice he’d smirk between himself or my other bro in-law..

also when I was with him and my mother in law and tried to talk to him he was the same way just short not wanting to talk, so I’d leave the convo and just go back to the room.. usually I stay in the room (just my personality I like to read and really be alone) however I still try and remain respectful.

I think when my husband and I set our boundaries when baby was first born I think it bothered my mother in law and she probably vented to him.. that’s the only other thing I could think of..

that or it could be because my husband is the only one working while I’m home with the baby and my mother in law.. or it could just be because I refuse to feed my baby the bottle or do some of the suggestions that were made reading how I feed or when I feed him baby food.. all in all it’s been bothering and I need advice.. can’t talk to hubby about it he will just brush me off..