Maya : I have a boyfriend
*some time later*
Maya : Please be completely honest with me
*some time later*
Maya : I actually don't have a boyfriend.
*some time later*
Maya : Lemme kiss you and do sexual stuff with you because why not? oh and you going back home to date someone makes it awkward, and I didn't like you not telling me about it. You weren't being honest with me.
*some time later*
Josy shows up at the door. (woops I forgot to tell you I'm actually in a relationship)
Sure there's nothing wrong with her. Nothing at all. She also forgets to tell Josy about what they did, but she had her plate full, so all's good.
Josy did nothing wrong, except she forgot to tell Maya she invited MC to her house and ask MC to "stay the night". Having sex is player choice, so not counting the sex there. But even if she and MC didn't, she intended to.
As I said, yeah I see nothing wrong here