She can’t see him in the mirror – she’s only sensing that he’s back there – so Integra hasn’t noticed the look just yet.

Integra: So…I’m getting younger.

At least these bloody expensive clothes still fit…

Alucard: They won’t for long.

Integra: Alucard, get out of the ladies’ room.

Alucard: Didn’t I say that form means nothing to me?