I haven't seen the original, but I see Betty is credited in the sequal. Who was she? Was she the woman that came to the grave after Monika had already taken the body? Was she the woman Mark was originally supposed to meet at the movies? Just wondering.
Betty was the woman who appears at Rob's grave after Monika has already dug him up. Betty was Rob's girlfriend from the first film, and also a necrophiliac like both Rob and Monika, so it makes sense that after Betty finds out her living lover has committed suicide, like a true necrophiliac, she went to go dig him up only to find Monika beat her to it...hehe.
Yes. At the end of the first film it looks like Betty "comes back" to Rob. But then they does something different with the story in the second movie, which is cool. I loved it when Betty came to a empty grave. (Looks like she's got a rich new boyfriend too, like she talked about before she left Rob in the first movie).