I think that, given circumstances, aki has the right to be concerned about Shinji leaving. I am wholeheartedly behind keeping him right there in bed for the duration. Mitsuru can help.
Also, d'awwwww. Falling asleep holding hands, so cute! And so incongruous, after just jerking each other off. It's a really nice touch, given how sort of on-the-cusp their ages are. <3