In one of the play throughs that I had, yes. I chose to save the Helayna girl from getting gangbanged by the orc horde or her knights and the MC's wife grew cold and during her daily events helping at the dungeon she went and f*cked the dark elf and a merman and I am sure that if I sent her to help out else where in the castle she would probably get f*cked by someone else. Basically the only way to keep your wife faithful to you and avoid any NTR is throw the Helayna girl to the horde, which I find f*cked up and exactly why I don't think the author of this game will ever implement any sort of meaningful RPG mechanics that allow me to avoid stuff like that.
So you mean she's just a hoe, who will cheat even if MC help another girl. Thats fucked up man. What was author thinking ? Except for few, we majority of user's hate ntr but author just ruin the story for this disgusting forced(technically) shit. Also I wanna ask you, can't we just kick out this whore wife of MC from his life?