Something definitely happened between Imlie and Aryan but whether it was just a bit of caressing and canoodling or full out consummation remains unknown for now.
What I would like to point out is that Aryan asked Imlie for consent for whatever it was they indulged in and she in turn gave it to him. I feel compelled to point this out because once upon a time someone cast an aspersion of marital rape on Aryan.
There is no rape, marital or otherwise, if permission is sought for and granted. Let everyone note that.