They'll... figure it out. Nobody's expecting anybody to have everything figured out right now, or even soon, realistically. A good solution for now is to just... take solace with each other. Everyone can be useless and tired and upset right now. The pile they're in may be awkward, but there's comfort to be found there now that all three of them were on board.

Kyoko is gently pulled toward Shinji, just enough so they can share in their cozy leanings pretty much equally along with Kai. Why not bask in what they do have for a while, if only to soothe their hearts a little more.