SO and family-update

Just annoyed my SO is way too friendly with my sisters when they come to visit and I always have to be so formal when his brother is around. Just a rant

Detail requested: his brother is really friendly and when he’s around me I always have to keep my distance and just not be too friendly or be alone without my husband around etc. My husband doesn’t do the same when my sisters are around and it’s like double standards. Note: we’re all grown in our twenties so it’s not like my siblings are kids and need to be entertained