Jackie does a pretty good job

Against Jackie you have not too much sense.
She methodically tests how could she turn you on.
She starts caressing your manhood with her hands. After a few seconds she is keeping your balls in a tight grip by one hand and is stroking your cock gently with the other.

You endure about 2 minutes when it becomes clear that you are going to lose. She takes your cock into her mouth -- still keeping your balls in her hand. She swallows all your cum. Then she stands up -- without releasing your balls.
"Welcome to slavery" she says, kissing your mouth.

"Sis, as you went overtime, I suppose he is all mine, isn't he?"