Below the belt and Two-timing

Below the belt adjective - Disregarding the rules (from the notion of an illegal low blow in boxing).

Two-timing and below the belt are semantically related. In some cases you can use "Two-timing" instead an adjective phrase "Below the belt".

Two-timing adjective - Relating to or being a sexual encounter or relationship between a married person and someone other than their spouse.

Below the belt and two-timing are semantically related. Sometimes you can use "Below the belt" instead an adjective phrase "Two-timing".