You join them

You decide to to go over into Lucy's room and watch them secretly hiding behind the frame of the door, you watch his cock thrust into her as his balls hit her arse from behind and her legs stay wrapped around his back with her nails digging into his already red scratched back, you notice your hand slide down to between your legs rubbing your still sore clit as you watch your roommate getting fucked hard moaning loudly as she's about to reach her climax, you take a deep breath and walk towards her bed to get a closer view as you see her on her back with her eyes closed as he thrusts one final time into her before the both of them climax together.

You sit down on the bed next to them as you watch them panting completely exhausted after the incredibly passionate looking fuck they just had, you lay down next to Lucy and take a leap of faith as you press your lips against hers and kiss her, you're not sure if she even likes you this way but you're 100% sure that right now all you want is to kiss her soft lips.

You part from your kiss and see Rob smirking at the scene of you two kissing when all of a sudden Lucy grabs your hair and pushes you down between her legs, taking the hint you adjust your position to start licking her freshly fucked sex, you kiss around her sore lips as slowly as you can while looking up to see her breathing get heavier again, you move to her clit and start flicking your tongue over it while slowly moving down to her wet slit, you slide your tongue in when all of a sudden a squirt of Rob's cum flows out and floods your mouth completely, you try and swallow it all but some of it escapes your mouth and drips down her pussy to create a puddle under her arse cheeks.

You start moving your tongue in a zig zag motion while your hands tease her thighs slowly, you increase the pace of your tongue zig zagging and switch it up to long up and down licks while switching the speed at which you eagerly lick her cunt.

You look towards Rob who's starting to stroke his cock again, you're amazed at how much stamina he has considering her fucked you from behind earlier and only just got done pleasuring Lucy as well, he opens his mouth and asks "can I join you two ladies?"