Cum while standing!

Description [POV Attack] (english):
She has done great, you want to give her a chance to cum, but with a challenge of course. She must stand and slowly work up towards her orgasm. She can cum, but if at any point her knees get weak or flex, she must stop immediately!

Bot dialog (english):

Description [POV Victim] (english):
You have done great and have earnt a chance to cum. Stand and slowly start to tease yourself towards and orgasm. You may cum, but if at any point your knees get weak or flex you must stop immediately!