Those who think it's not normal, think about it, these are strangers to each other. That's why there's nothing wrong with it. Two adults of different sexes are at home alone, hormones are splashing in both of them. So the skinny blonde was not at all against caresses from her stepbrother, she only broke down for show, but with his insistence his brother showed the seriousness of his intentions, and that this will not go beyond their bedroom. Both are happy at the end!
They did a good job, but I doubt if any of the guys are the lady's husbands! As a last resort, if the lady needs two guns at once, she can buy a toy. But to let the second man come to his wife, I think it is very inconsiderate!