Originally Posted by
fezzington
They’re probably allowed. Regardless, Youd be be hard pressed to find an FA who will say something during cruise.
Just please don’t put it in the aisle and block another passenger who’s not in your party.
Hopefully the OP's family will use the three seats. Passengers that would be in a window seat next to two passengers using those foot rests, there's no way they could get out of their seats.