Beth McIntyre is the woman that Rob has been in love with since college. But after these two sleep together, Rob doesn't call for a month, leading to tension between the pair when the monster attacks in Cloverfield.
Beth McIntyre: [sees monster] What is that? Hud: It's a terrible thing. [while trying to get to a flight of stairs, Rob encounters a parasite and kills it] Beth McIntyre: Oh my God! What is that? Hud: I don't know! Something else! Also terrible.