Is there no NTR with Eve? Eve is the ideal girl to share.
But when I gave her to Red, nothing happened, at all. Also when I met Red and got his card, then went home to the study and called him up, Mitsuko was there. Never met her before, she just was there and seemed to know him.
Anyway, Eve's stats didn't change all week, she's still a virgin and nothing happened. Killing a month of time and trying again did nothing, Eve just goes off to train and then nothing happens. I know the character won't leave the mansion yet, but I thought something would happen. The wiki doesn't shed any light.