Yeah i also saw this as something completely out-of-character in theory, then i remembered his backstory, the dude was groomed as a child to spread hatred and misery almost as a way to cope whit the fact that he got raped as a child and to him, abuse is some sort of duty, therefore even tho he knows he is screwing whit these women, he doesnt see it has inherently wrong, because he got twisted to think this was something he was meant to do.
Also technically you can just not do it and honestly wouldnt be out-of-character for Mars to just ignore these insane women altogether, so either way, its not strange whatever choice you take, the thing is that Mars KNOWS he is spreading misery and hell you can tell he isnt happy about it, in fact he constantly duels whit that bitter reality, hoping that one day someone will punish him for that, the dude is a rotten tree, but i THINK that there will be a path in which at the end of all of this insane madness, he will right some of his wrongs.
I hope that at least.