She was embarrassed as he pinched her cheeks. But she definitely felt good.
Anyway, Rex manually broke some more bones and literally shattered them. Of course, that would mess up all the blood vessels and blood flow due to which, even if she weren't feeling pain, she could end up dying, but no.
Rex carefully hit the right spots to break the bones and reattach them almost immediately. This way, there would be no complications.
Also, for the small shattered parts that were stuck in other parts in the legs, he used teleportation to get rid of them. He literally extracted them out of her body. If he had shown the bone fragments to her, she might have ended up fainting so he stealthily got rid of them.
In any case, he continued with the treatment and soon enough, ended up healing her legs.
He then said, "I've done healing your legs…"
"Now, your-"
"Ahem, your-"
He wasn't sure how to ask about her showing her hip to him.