As a Stag, it's seeing my wife working a random dick until the guy has to release. And that she's ready to have the strangers sperm shot onto her or into her. That she feels she accomplished a goal. She brought a cock to ultimate pleasure and the proof is the sperm on her body. And she knows that as her husband, I'll be adding more cum on her.
Here, a husband watches a stranger he vetted empty his balls onto his wife's tits. The wife shows her husband that she can "clean up" too. She licks the strangers shaft until she gets to the head, whcih she takes into her mouth to suk off the last rmaining sperm that may still be in his dong.