Nah, just one of those excuses people use to justify infidelity. “She made him feel masculine that’s why he slept with her, he made her feel loved that’s why she cheated, he has ADD, she was just drunk etc” cheating is cheating. It’s up to you of course if you want to stick around.

She likely has been cheating for awhile so I’d see a doctor and check for STDs

Herpes, STD and especially HIV is a high price to pay for a little bit of fun