Black mirror cheating?

Ok so me and my bf were watching black mirror last night on Netflix and something came up that i think is cheating but he doesn’t. So the story goes this guy hadn’t see his friend in years(he is married and the friend is in a relationship) and that friend randomly showed up at his birthday party 10 years later and gifted him a virtual reality game they used to play together. When you start playing this game it puts you to sleep and you are physically in the game as what ever character you pick and they always pick the same characters. His friend(who’s a guy) picks a girl and he picks a boy. And it’s a fighting game so you can physically feel everything happening in the game. Well after the fight they end up on the ground kissing and they are both so freaked out they exit the game. The next night they play they have sex in the game.(remind you, they can physically feel themselves having sex as if it were really life) And this goes on for months. They only play the game to have sex with each IN THE GAME.(they never see each other in real life) they are always at their own homes. They do not so often he doesn’t have sex with his wife anymore so his wife thinks something is up because they were supposed to be trying for another baby. So he stops playing the game for a while then ends up falling back in and they start having sex again. So they meet to see if they have feelings for each other in real life and they kiss but they said they feel nothing in real life after the kiss. Eventually he tells his wife what’s been happening and she forgives him and allows him to play on his birthday and she gets to go to the bar and pick up guys. Do you think this is cheating even though it’s not real life?