Sometimes, when a slavegirl comes between a man and wife, she actually comes between a man and wife
"Two men and a woman having sex, illustrated on the walls of a Suburban Bath in Pompeii circa 79 BC." They get it.
Imagine her fingers running along your cock while a stranger fills you up with his hard cock... (MMF) (Source in comments)
The perfect wingman helps you get the girl and lets you cum on his chest... (MMF) (Source in comments)