Cheating in relationships?

Hello guys. Posting here as coco mods didn't like it or it probably got reported.

Last year I reached out to a profile from the chat room. Very difficult to begin chatting with but slowly she started chatting and opening up. She ended up blocking me for various reasons. I am not sharing her id. But from all the conversation the part that stood out - she's married and staying away from her husband in another country. She's having an affair with another person there and her poor husband doesn't even know.

We have a lot of people where the husband and wife aren't living together. Is it really that common or she's just one of the rare ones. The part that irked me was she kept justifying her actions