And he's going to sputter at her words, immediately going on the defensive.

"'m not trying to flirt with anyone!" He snaps, already blushing a deep crimson red as he looks away from her, huffing in response.

Or, well, he just hasn't the foggiest how to do this whole flirting thing anyway. It's not like he was the diplomatic one in the family and he certainly wasn't the one all the girls were going after.