Is it cheating if...

I guess I posted in the wrong place earlier.

I don't really care if my husband watches porn. It's part of life and I get that. But tonight he told me that he met up with a guy online and they talked for a while then masterbated together via video chat. Which personally I feel is different than just watching porn because it's about the connection and not just getting off.Here's the thing though, he has multiple personalities which is a recent discovery because they are coming out more and he had switched when it happened. Does that even count? I don't know how to feel. I am heartbroken because of obvious reasons but I don't know if it's even fair for me to feel that way because it wasn't technically him who did it. I'm hella confused. He is on meds they just aren't helping