Less evil sure, but you're still the don of the mafia and they're the police sending agents to take you down.
Besides I'm not sure if their dialogue actually specifies they want a monogamous relationship, they just want to be loved. Maybe Squid Maid, but I'm not so sure of that either.
I think squid maid is actually the one who's mostly fine with you in a relationship with the others since she's the one helping you get in a relationship or brainwash them-
Captain is relieved when you say you aren't spending time with anyone else but her
Agent1 is happier if you say that there's no one else but her and captain in the facility (to which she replies by saying its up to them to satisfy you.. threesome?)
Agent2 I uh, forgot because I didn't talk to her (i dunno her room looks weird)
Agent3 is the most specific in wanting monogamy, asking you multiple times if you're being loyal and not fooling around with anyone else- relaxing if you confirm that and saying 'you're too (i forgot) to be a playboy'