I would say it was cheating to the point where they included her in their lovemaking as he himself called it cheating and the wife seemed to have a cuckolding fetish.
I love how she seems like an innocent type, then goes into full "you're a slut, wife. Mind if I just take your husband." The territory claiming is strong, and I love it.
Actually, the kids go to Wani, so... you know... it's just the few 'I'm not really kinky no matter what you catch us doing' types that express any dislike.
A Christmas tag? Interesting.
Still...Very open about cheating, huh? If she like, allows it, is it still cheating? Or rather what would you call cheating with permission? Just some kind of play?