Skellig has no urgent need for her to move, can breathe just fine where he is - so he works her through those aftershocks, coaxing her to enjoy and savor everything that she is feeling and experiencing. The benefit is that he is able to freely absorb back some of that unbridled joy and exuberant pleasure that she has put out between them, and it works to top up his reserves...

He is in no rush.

(Plus, he knows to be gentle as he works at her, and she still is making happy little noises as he does so; if it gets to be too much he will sense it and quit.)