did lynette's husband ever cheat on her and is it ever revealed??

i am almost done with season 1 and in the episode when her husbands father gets caught cheating in her house and she kicks him out, at the end of the episode her husband sits at the kitchen table and tells his father that he did something that lynette would never forgive him for after she said if he cheated shed leave him and take the kids with her i dont care about this being spoiled i am just so curious if it ever comes up again bc i feel like thats a pretty important thing?? they are my favorite couple on the show 😭😭😭 they are so sweet to each other and i was so sad that he implied he cheated! the suspense is killing me!!!!