[Panty Fetish, Lactation Fantasy] Your sister's friend, Sierra, gave you her panties in "Sister's Friend Exposes Herself to You" and now she's back for more After a particularly wild night with your sister, Sierra sneaks in and catches you with her panties! It turns her on so much, she tells you about her wild night, and takes a pair of your sister's panties out of her pocket. She wraps them around your cock (POV, no penis visible) and starts to stroke you, then reveals that she has been lactating recently [fantasy], and needs you to suck on her tits! She shoves them in your face, and, once satisfied, makes you cum into the panties.