Brother-in-law has issue with me nursing, even with a cover

So I’m due with my second and struggling about nursing around family because with my first my brother-in-law was not happy.

I never nurse without a cover unless it’s just my husband and I because that’s just my personal preference, so I always wear a cover, which let’s be honest, is more modest then what I’m wearing because it’s basically a turtleneck. I’m a strong believer in modesty and the cover is very modest as it keeps me even more covered.

I hated leaving the room for 30-45 minutes when we had family get together’s.

I talked to my mom about it, her and my dad had no problem with it, as long as I was comfortable. My brother and his wife didn’t care, she actually nursed around us too. My sister doesn’t care if I nurse around her, it’s just if her husband’s around that she gets super frazzled and he freaks out.

He literally walked in the room one time while I was nursing WITH A COVER and goes “woah!!! Sorry, didn’t know!”, covered his eyes, and walked out of the room. This was in front of my family. It felt extremely uncomfortable and frankly, a little rude. If I started nursing while he was in the room, he always got up and left.

I know this debate goes in circles, but I honestly want to know how to properly, politely, and respectfully handle this situation. I respect their home so at their house I do go in another room, but at my mom and dad’s I asked and they said they’re okay with it.

Should I still go in another room just because one person is uncomfortable?

What’s the biblical way to handle this?

Keep in mind he’s a lot older than my sister so he’s very old fashion in his thinking. He’s also a control freak and thinks everyone should do things his way lol

Regardless, I just want to do the right thing on my part when this second baby comes.

Thank you!!!

P.S. please no “screw him” comments, that’s not my attitude towards this (although it’s tempting lol). I just want to know if my decision to stay and nurse regardless of his feelings is the right thing to do.