Teaching married women to pleasure other men with BDSM and bondage

A married man visits his friend and decides to teach his wife how to pleasure other men. The wife, eager to please, is tied up with ropes and toys while her husband watches. The wife's new partner is an older man with a big black cock, and he takes his time to show the wife how to pleasure him. The wife, now fully aroused, is ready to take on the older man's monster cock. The wife's husband watches as the older man fucks his wife, and he can't help but get aroused too. The wife, now fully satisfied, is left bound and in orgasm. The wife's husband, now fully aroused, is ready to fuck his wife again. The wife, now fully satisfied, is left bound and in orgasm.