“Hotwife” is a term most commonly used to describe a wife who, with their partner’s full knowledge and consent, engages in sexual activities with other play partners that are not part of the marriage. It is common for the husband to watch the wife play with their other partners, or to be informed by their wife of what transpired during their play sessions for the purposes of mutual sexual gratification. A “hothusband” is simply the same set of circumstances from the husband’s point of view.
It is common for one of the partners to “reclaim” the other by having sex with them after they return, so as to assert their role in the dynamic again.