A Jealous, and so, Ugly Sister. From whom she has a brother who is dating a girl that she doesn't like.
Also See: Little Bitch, and Ugly Friend.
I heard Ugly Sister doesn't want Brian seeing Alex anymore, so she told her brother no more sex love until he stops seeing her.
Ugly Sister really doesn't like the girl and is very jealous. She wants to BE her brother's girl. Instead of inviting her in, she condemned her out of the family.
Ugly Sister: "Hey Brian, When are you gonna dump Alex, she is so Ugly.!"