My sister outs my trans friends to my transphobic parents

My sister doesn’t have many friends of her own. I have a lot, and all of us are LGBT in some form or another. I myself am a bisexual woman. I have two trans men in my friend group. One of them is a longtime best friend, and the other is a friend’s boyfriend, so we aren’t close.

My sister started showing pictures of my non passing trans male friend to my parents and saying “look, that’s her” when I told her not to, because she knows how transphobic they are. It gave my parents the opportunity to mock me and my friends and tell me how strange they thought trans people were which lasted for a whole fucking two hour car journey. My sister is a lesbian, and used to identify as non binary. I don’t know why she’s outing all of my trans friends to my parents. She never sticks up for me or takes my side when I am forced to justify why I want to be friends with trans people to my family even when I know I don’t need to justify anything.

I’m just so fucking sick of my judgemental family. Especially my sister. She acts like she’s never done anything wrong and I can’t confront her about her transphobia because she’d tell my parents which would give them the chance to mock me and my friends.

My self esteem is so low because of this. I feel so anxious and horrible every time I’m around my family now, I just don’t know what to do. I almost started pulling my hair out again. Leaving isn’t an option for various reasons. I’m so so stressed.