Angel, Season 5

[William walks into the hotel and sees Angelus humping a woman dressed in white on the bed.]

William:
Well... looks like you haven't had your fill of her after all-

[Angelus leans back, revealing that's he's been with Drusilla.]

Drusilla:
[rolls her head over to look at William] The little children didn't come out to play. [sits up, leaning closer to Angelus's chest] Did you miss me, pretty William?

Angelus:
I'm sure he did, Dru. After all... you are his destiny.

Drusilla:
Oh. That's so sweet.

[Angelus laughs at William. Drusilla joins in the laughter. William gets a look of enraged hatred as he glares at Angelus.]