I'm pretty sure Logan's route isn't complete yet. Most the game is still a work in progress... I don't think you can get a second heart with him yet though.
yes. just get a high like point with him, get the best ending for the nightmare 2 event (i don't know if good ending will work or not or maybe you don't need to pass the nightmare event yet i don't know but i did it after i got the best ending at the nightmare event) and sleep in the ruins at night. rhot will be beside your bed but left afterward and then you confront him and let him sleep with you without your permission. i'm sorry if it's inaccurate because i forgot how i did it