I would ask yourself if it would have mattered as much if DH hadn't gotten turned on? I wonder why he told you at all? There may be more worth exploring in you and DH's relationship than you think. I would not care if a drunk woman kissed my husband. That my husband who does not enjoy drinking kissed a drunk woman back and enjoyed it. . . that would be a slightly different story (especially if he told me versus if I just saw/recognized it or never knew because nothing was going to come of it in any event so he did not tell me).

I don't mind that my husband gets turned on by other women; we're all sexual creatures, and I don't mind when my husband tells me he enjoys another woman as we're walking down the street or in a restaurant, together in public, but, in this instance, I'd want to know why he told me when I was not there and part of the experience? If it were just her kissing him, I could see his telling me, thinking I might enjoy sharing that and commiserating with him; she drunk and "disgusting" and he not? But what is the message were he to tell me he enjoyed kissing someone else? Is he complaining because I'm sick? Is he worried because he enjoyed it when he hadn't expected to? Why did he tell me this little, inconsequential thing unless it's not inconsequential?