Barbara Krustofsky (formerly Barbara Van Horne) is the ex-wife of Melvin Van Horne and the mother of Melvin Van Horne's son and Josh.
History
In the episode "Colonel Homer", she was mentioned as the sister of Krusty. She was first seen in the episode "Realty Bites", where she played bowling in the house that Marge tried to sell.
Another important fact about this character was mentioned in the episode "I'm with Cupid", when all the men of Springfield were angry with Apu because he was giving large and expensive gifts to Manjula, leaving the wives of the men jealous and envious. Some inhabitants began to argue in Moe's Tavern about that and, among other comments, Mel says that Barbara is no longer satisfied him in the French arts.
She was also mentioned in the episode "All About Lisa", where, in The Krusty the Clown Show, Mel asks Krusty for a little dignity since his wife was giving birth to her future child.
In the episode "The Nightmare After Krustmas", Barbara separates from Mel.
In "Springfield Splendor" it is implied they might have been remarried, as Marge asks Mel to say hi to her for him.
Appearances
Episode – "Realty Bites" 
Episode – "Colonel Homer" (Mentioned, not by name)- Episode – "I'm with Cupid" (Mentioned)
- Episode – "Homerazzi" (She appears in this episode but she has brown hair.)
- Episode – "All About Lisa" (Mentioned, not by name)
- Episode – "Pay Pal"
- Episode – "The Nightmare After Krustmas" (Letter writing for Melvin Van Horne)
- Episode – "Springfield Splendor" (Mentioned)