You're lounging on the couch with your GF watching a movie when her housemate struts in dressed only in fire-engine red lingerie. Your girl gets pissed, but the housemate just rolls her eyes like "this is my house too" before giving you a full view of her ass and a slow, knowing wink on her way out.
You go upstairs some time later and she emerges from the bathroom in a towel that might as well not exist - tits out before the fabric even hits the floor. Her hand's down your pants before you can protest, working your cock through denim until you're throbbing against her palm.
Later, with your GF napping beside you, the housemate cozies up under the blanket asking if you're really satisfied in your relationship. Her fingers trace circles on your shaft as she whispers how she'd treat your dick better - then proves it with expert strokes while your girlfriend snoozes inches away.
She leads you to her bedroom trashing your GF's skills in bed, promising to ruin you for other women. And oh fuck does she deliver - that mouth sucks your soul out through your cock before she sinks down on you, riding until you're painting her tits with cum... just as your girlfriend walks in.
This immersive custom is from the boyfriend's POV and includes implied POV handjob, POV blowjob, implied POV cowgirl riding (but I did actually have the dildo inside me cos it felt too good and you can defo tell) and POV cum on tits.