NOTE: Apologies for the inconsistencies and mistakes from before. I'm really sorry about those. I hope I can make it up to you with more stories... it was my bad :(
Anyway, here's your story!
***
"What?" Annie asked in shock. Grace smiled innocently and stared. "You don't mean... oh my god... Grace do you like me?" Annie asked.
"Yeah" was the simple reply.
Annie blushed, then asked quietly, "Since when?"
"I think starting from Middle School. You were getting such a nice rack, and kept showing off your body around me for some reason. Remember that night I stayed over and you heard something at midnight? That was what you thought it was, and the closest I masturbate to you. Mmm it was so hot! I get so horny when I'm with you Annie!" Grace blabbered.
"That changes everything," Annie muttered. "Screw experiments, I wanna have some fun! And you deserve some too, Grace!"
Grace could only stare, as she was too drugged to understand what Annie had declared.
"You said you masturbate to me?"
"Mhm"
"Could you... do it here?"
Instead of answering, Grace's fingers started to trace her wet pussy. Then she rubbed it until one hand was soaked in her juices and she brought it to her breasts as her other hand started to pump two fingers in and out of her slit. Annie gasped in arousal as moans came out of Grace as she fingered herself on Annie's couch. Grace started to move against the couch pillows, and Annie lay alongside her, unconsciously sliding a hand down to rub between her legs.
"M-massage your breasts" She ordered, and Grace's fingers left her clit and joined her other hand on her boob.
"My turn..." Annie muttered as she slowly circled Grace's swollen clit a few times, making her inhale sharply, then moved lower, pushing into her folds with teasing slowness. Her fingers slipped deeper, into the warm parts. Now, Grace had her hands stroking her breasts, staring as Annie fingered her. She had slim, dexterous fingers that found the sweet spot inside Grace with ease.
"Grace, are you going to cum soon?"
"Y-ye OOH"