You knew they were also locked when they asked to lock you up, but you had no idea they expected you to match the time they already had in their belt, and since she was Ace it wasn't difficult at all for her to last the 3 years she already had.
It had only been 3 weeks since you were locked up by the strange person at the bar, however, you were told if you wanted to cum, you had to record it in your sissy clothes and do it anally. Apparently 3 weeks was enough time to make this sound very reaso