I had sex with an ex. She was an undefined ex, but she was pretty. We were in a place that looked like a hotel, it has views to the inner courtyard. In the courtyard there were a couple kissing and a child playing. Another person arrived, it turned out to be the husband of the woman and he surprised them.
The husband worked in a military base, and he made an amazing feat of self-control to be courteous while being severe, and obtained information. The child came out running with a pair of shoes and told him "you forgot these yesterday", and the father implied that he wouldn't be back, making it understood that what the couple were doing was wrong, while concealing it from the child.