Do you look really young? Maybe she thought you were a teenage boy - I recall once at that age cumming when rolling on a condom while looking down at the spread eagled destination. Luckily she wasn't disappointed for long as at that age guys are ready again in a couple of minutes.
No I don't look young and am not young...The "Did you cum yet?"..is usually the provider who's got a lackluster attitude at best, disinterested, poor actresses and just want the time with you to be over....The few times that was asked of me during the "act" it was with that indifferent back drop and talk about a mood killer?..at least for me anyway...