Yes that's all correct Yasu will do it if her God commands her to do so, but Yasu idea of sex is basically "gettting to 3rd basere kinda like how she orgasmed while she was preaching (then fell over ontop of Sensei, passed out and Sensei went WTF? Nope! placed her on the bed & GTFO'ed!!) IMO. However Yasu's God is the Callus one, I think, he just wasnt Sensei to take and fuck every girl regardless of how they feel or want to and for Sensei to disregard and continue to ignore whatever little morals he has while doing it. And because of that, the God won't command Yasu to give herself to Sensei. I think that brief time where the God stopped talking to Yasu was to test if Sensei would do it while she was full of worry and not so much in a consenting mood. Even the aftermath of Yasu orgasming and then passing out was also a test, and Sensei couldn't.