She's A Butt Slut

My attractive gf is a lifelong butt slut. She began as a precocious teen using hairbrush handles and graduated to fatter objects like cukes and eventually dildos up her bum. Her stretched and puffy anus really resembles a second pu$$y and is her preferred means of masturbaiting with her bum stuffed and her hand nearly fisting her vag.
After a few drinks we might be going at it and I question her about her past. Sometimes she tells true stories and other times claims it's all just made up for foreplay or fantasies. I know one thing she sometimes says is about how for a certain time when she was first away from home at uni she had taken some random fat West Indian dongs up the bum and would love to try that again as a sort of bucket list thing. I'd love to watch her having her back hole pounded out and injected with steaming semen. Love to watch her push it out afterwards the best.