Remember kids (and not-kids):
Consent is like a little one's padding - it can change state at any time. If you are unsure for ANY reason if your partner is still up for it, take a moment to put things on pause and confirm... like we're seeing here. <3

Realistically, it is NOT any specific role's "job" to check on that.
Even if you play the little role, it's just as valid to ask the "adult" if they still are up for it.

But doing this shouldn't also preclude anyone from voicing their change of mind at any time during play. But some people have a harder time voicing it, so asking is another good way to keep things respectful, wholesome and positive amongst everyone involved. :3