Mary Margaret is Peter's night shift partner on the force. She and Kwai Chang Caine were immediatly attracted, and have gone out to dinner many times. Their relationship has deepened, and Peter isn't as embarassed about it as much as he was.
"What does your underwear have to do with my gloves?" - Peter to Skalany
"Put your apron on. You're scaring the horses." - Skalany to Peter (when all he's wearing is a baker's apron)
"Skalany, if you're so damned impressed with him, why don't you take one of his classes?" - Peter (in a fit of pique)
"Maybe I'll just do that." - Skalany, eying Caine
"I would be honored." - Caine to Skalany