She can't say no to him cumming inside her even though it seemed like her husband and herself agreed not to let that happen before hand......her mind and body at that very moment lets nature take over and she wants to take his seed....it's the feeling of a better lover inside you and her body instinctively will take his baby. she realizes this immediately after and says almost apologetically says " Oh Paul " to her husband......This is exactly what goes on every day....the white married wife just can't say no to taking their seed