Quote from Lilith in Dinner at Eight-ish
Sam: What're you so upset about? I wasn't even dating you when I went out with Jill. That's when you were living with Frasier. Lilith: She lived with you? Frasier: Well, only briefly. Uh... Lilith: You said you'd never lived with anyone but me! [Diane opens the bathroom door for Lilith to enter] Sam: Yeah, open that's right. [Lilith storms off into the bathroom with Diane]