[ There's enough amiability in him left to realize that she probably doesn't mean that question to be an accusation, so he reciprocates with a ghost of a smile. ]
If we've been drinking, yeah.
[ Implied: 'you might know something embarrassing about me'. It's as lighthearted as he can get, a half-joke. ]
no subject
If we've been drinking, yeah.
[ Implied: 'you might know something embarrassing about me'. It's as lighthearted as he can get, a half-joke. ]