Did he cheat or not?!?!

I just found out about a year ago my husband was sexting another women....he was drunk when he told me and i asked him about it the next day and he started to act weird and try to deny it but then said yea but then he said “Well it’s not like I cheated on you” um what sorry that is cheating if you were sending dick pics to another women and she was send pics back of her tits and vagina yea that’s cheating in my books! Am I wrong??