it's happened to me, though it was the other mun picking up psls with the mainstream muse i was playing against. i let it slide until they started slacking in our scenes, and then i asked them, they got defensive, and it ruined our pair.

tbh there wasn't much to lose at the end anyway so i was glad for a definite end bc it was headed into withering death territory.

with a psl, i'd let it slide. some people can only play one face at a time and if it isn't affecting your line, i'd ignore it.