The impression I got is that they didn't like it, but knew that saying anything at that point could only make things worse (either further antagonizing the MC, or making Sage curious).
Of course, in light of Maya's "No strings" policy in Episode 5, maybe they really didn't care about the MC fooling around and were just worried they wouldn't be next in the queue.
I think they do care, especially Josy who was clearly taken aback by what Maya said. It seems to me that Maya is, for whatever reason, going by the old saying, "If you love something set it free. If it comes back it’s yours. If not, it was never meant to be."
This saying actually rings quite true for M&J's relationship and perhaps Maya feels like, if it's meant to be with the MC, then he will come back to them just like Josy came back to her, and if not, then it wasn't meant to be. It does admittedly feel like strange behaviour from someone who seemed so willing to move on from Josy and be with him just 2 days ago, but perhaps she simply has a renewed level of happiness now that Josy's back in her life that, while she does have feelings for the MC and would like for him to be with them, she wouldn't be lonely again if he didn't because she has Josy.
So, rather than force anything with the MC, she's just going to let fate take its course and hope for the best.
As of right now, definitely not. She's expressed multiple times that she isn't committed to you and seems to be very well aware of most of your "shenanigans" with other girls. Later on... well... we'll see
I really don't think she's aware of that at all.