You have a sister named Helena, you're twin's but not identical ones.

Apparently Helena is the "Bratty" twin while you're the grateful one.

She's more popular in school than you, has more friends that bullies you.

You were talking to a friend on call and then Helena comes in poking around your stuff.

"You're dating someone?"

"It's a friend..." You say.

"Oh yeah?" She then storms out the room and comes back with your mom.