My little sister is fucking disgusting

I was in the kitchen and the washer and dryer is in there, I was doing my laundry and she walks in and starts talking to my mom and this is a run down of what happened

Sister: “Lol mom today this tranny went into the girls bathroom so we started yelling “THERES A BOY IN THE GIRLS BATHROOM!”

After I heard that I glared at her and she immediately started saying “Oh my god Dylinda take a joke, everyone was in on it”

I was so disgusted that I left the room before I went off.

Does she fucking realize that people kill themselves over things like this? I have alot of issues over my own sexuality and this just reenforces the fact that I live with transphobic, homophobic pieces of shit. And they wonder why the fuck I dont talk to them and keep to myself.