Cucked Adrien
Marinette is friends with benefits with chat until she gets the courage to confess to adrien. When she tries to end it with chat he blackmails her into continuing their FWB and forbids her from letting adrien touch her. When she gets pregnant he makes her pawn the kid off on adrien, he of course buys the unprotected hand holding excuse and they get married. Of course chat makes her come to him on their wedding night and pounds her loudly so adrien in the next room can hear it.