Hello, cozy bed. You will be extremely welcome to help alleviate even a bit of their stress.

After Kyoko scoots her way in, Shinji slips his hand out of Kai's, gently pressing it against his back. You, in the middle, that sounds like the absolute best course of action here. Shinji will follow him in, don't worry, all three of them will have a comfortable future, if only for tonight.