I've seen examples where guys here have lost attraction for a woman if she acted terrible or did something nasty and of women losing attraction if a guy didn't finish how he started.
Is this 100% accurate? (even then?)
Once you are sexually attracted to someone, it NEVER goes away, no matter what they say. Different circumstances and situations might prevent the sex act from happening, but this doesn't mean that she still wouldn't give it up if conditions were perfect.
Others, please remember: The Kidd!! answers first.