Girls that cheat don't give a fuck how big you are, you could be as skinny as plank and still get fucked..that's how it works man. She probably just felt like she was fulfilled in a different way than what you give her, total bullshit man...especially when you have kids.
hell yeah they do
but srsly, almost no women care about how big you are
that's just for you to care about which is how it should be