doesnt poly imply she should be saying "our wife?"
poly, the communist sexuality.
for real tho chances are he's just getting dirt on her so if she tries to divorce and get leverage on the fact he cheated he can have some leverage back.
More likely he’s a dick and everything about this is terrible. BUT there are open relationships where the original couple may allow each other to seek other partners to help Fulfill their desires (sexual or otherwise). In these relationships not all partners will be with each other but may be okay with that. For all we know the guy and girl could be in a side relationship that approved by the wife, and the wife may be seeking another partner without the husband
poly, the communist sexuality.
for real tho chances are he's just getting dirt on her so if she tries to divorce and get leverage on the fact he cheated he can have some leverage back.