Marital sex just needs to be varied. If the couple won't do it together, then clearly they will still do it secretly each separately! I think this home variation is acceptable, in any case it is not as extraordinary as entertaining a large group of swingers. My wife and I once invited me to one of these, against her this clip is just sex puritanical family!
The chick has no problem taking it in her mouth and sucking it, she cheats on her husband knowingly. If she needs to swallow, she swallows, if she needs to expose her buns to passing motorists, she'll do that too. The blonde acts like a bitch, ready to do any order of her lover or master.