[She opens her mouth to correct him, before he does it himself, so she just shrugs instead, smiling a little.]

I'm very stubborn.

[And persistent, and kind of a pain in the ass, but the main concern right now is that look on Donny's face.]

I mean it. [Even if he doesn't believe her, she means it.] Oviously there was something going on there. [with a gesture at the hickeys (don't think she didn't notice), which seems to suggest that his lady was attracted to him, if nothing else.] And you're a really great guy, Donny, and I'm sorry she can't see that.