Yep, Shou getting turned in by Umi has continued to be a thing. Their living situation being what it is, they seem to have very little 1:1 time to talk and figure things out, so good for Shou to communicate clearly that she does like being touched towards the end.
Shou’s hypersensitivity to light caresses and the message chair and also her lack of sensitivity to temperature are again very consistent with the idea that she is autistic and has different ways of processing sensations. Maybe Umi should try a firm hug and deep pressure instead?