cheating or nah?

I had a couple of friends over we had been drinking... one of the girls kept following my husband they kept talking a lot i,walked away to go pee husband and her are one the ground shoulder to shoulder talking... being flirty and what not I guess he tried to kiss her she stopped him. we where all drunk... I'm upset but don't know if I'm overreacting, I kicked him out, he wants therapy and work it out, we have 3 kids and own business .. opinions?!