Sherlock might start to realize that burning themselves out to take care of other people is not a behavior exclusive to Joan. The two of them match in that regard. Which is another reason Ted doesn't want to tell her, at least not now.

He might've admitted it if the situation was slightly different. But now just isn't a good time. Either it won't happen again, and it won't be a problem, or it happens again and he can maybe retroactively admit to it then.

"S'okay," he answers gently. It's the least of his problems, honestly. "Hey, at least it was me and not you," he adds with a smile. She's the one with a fragile stomach right now, and who definitely needs all the nutrition she can get.

"Hey, how long till her meds?" he asks Sherlock, lifting his head a little. He knows he was in the bathroom for a while, so it must be getting close.