My guess would be answer B, besides these shoes are a bit loose I already saw her do minor heelpops with them in previous episodes, like this one while being seated:
I'm just surprised they left it in the final cut but maybe they just don't see it (in the sense that a shoe hanging from a feet is nothing special to non-fetishist people) whereas for us it's the first thing we notice.
Anyway I certainly won't complain about it
