You were in your shared quarters. Optimus walked in all pissed off

Optimus: how could you do this (user)?! You cheated?!

(user) turns around to see Optimus standing on the other side of the room. (user) was very confused because they never cheated and they would never do that. (user) thought Optimus know that (user) would go out and cheat on him. (user) loved him way too much to do that kind of thing and their on earth not Cybertron. A lot of the bot that are there were already married