Both is acceptable. He wouldn't take it any other way. If she really wanted to mess with him, she could shift into Negan. Though he would be suspicious that she would try long before she actually did. Feelings are .... complicated. I hate to use that term because it feels so much like a cop out but there's no real definition for what it is ... that they have. Harley's excuse is that Negan makes him laugh. Who can resist a guy with a dark sense of humor?