Yeah it's cheating if you go for the massage plus. Unless like Freddy says, she knows you go. In which case she obviously approves and accepts your actions and therefore doesn't consider it cheating. Her knowing essentially makes the playing ground even.
If someone always wins at poker, because they cheat, and you don't know, then it's cheating, changing the rules. But if you know what they are doing to win and you still play, then their actions become part of the game. I guess they are still cheating on the basic rules, but you accept those changes. Anyone else would say they are still cheating.
hmmm...a conundrum.