Do people talk to you in ways that leave themselves the option of denial?

i think this girl i like is doing it to me. im in the process of selecting a car and debating about whether to go new or used. as i approached her she just happend to be talking about cars to her friend. i was just able to catch ' i'd never date a guy with a car like that'...as i got into earshot. then they broke off their conversation and acknowledged my presence. if i mention it she can deny trying to influence my selection and claim that i was not there for the full conversation. but i wonder if it was coincidence or manipulation? does this ever happen to anyone else? and her friend does not seem like any mere unwilling co participant. the whole things seems just so perfectly near the fringe of being contrived.