for starters, I'm quite into Sage.
I think he meant to say you are required to be on Sage path to stay at her place in EP4, which involves giving her guitar lessons.
Before that, she asked MC's promise to spy on Chad as a trade to return his stolen guitar; Under her request, MC went to the gym where the alphas frequent, which is pretty dangerous considering the history of MC and the alphas, MC was taking risks; as we know it, MC got the 'proof' and then beaten up by the jocks. MC is "even" with her, to use her words. you could also reject her initiative to make out (who are you kidding). but no guitar lessons, no deeper interactions in season 1?
you can deny her in first session (again, no kidding); but gal just straight up beat MC's meat in second one and started sexy time, no alternative. so MC is kinda a support (material or whatever you call it) during her time of frustration and through which they sure bonded in a way.