The returning kiss was seen in 129 after Yuma thrusted into her. She was kissed on a lot but we don't see the tongue action to show she was returning it. Looking at 128 you can see Yuma was doing a lot of things to her! It looked more overwhelming than anything.
Wouldn't be surprised when it comes to showing Fuckboi. I doubt we'll get all the answers from things on Sakura's part. She'd need a whole chapter for that.
I do want Shinobu to bag Fumi, but I'm divided on if I want him to do it now or later after the closure with Sakura. Still, seeing some more Fumi action won't hurt at all!