Responses
It's a debatable if it's consensual on Josh's part. It was mentioned before that whatever he feels is related to the fact that he is marked by Chase. That is his alpha. It's natural/psychological instinct to want the alpha that marked him.
It'll be shown here much later on but Chases family is quite bad. They haven't treated Chase at all well since he was a child. Not to mention Grayson gaslighting Chase into believing that he spent his first rut with a dog, which made Chase fear dogs an ungodly amount.
Also before anyone questions whether it's forceful or consented on Josh's part whenever anything sexual happens, yes it is. The amount of times he thinks about kissing Chase again or if he should give in and experience the night they had before again are to many. But he doesn't force anything on Chase either.