I meet my new Mistress for the first time

I realised that the ‘lotion’ was actually some kind of lubricant and it was easy to guess what was going to happen next. My intuition proved to be correct as I felt a very large, firm object forced deep into my anus, I gasped in shock as I wasn’t ready for it and it happened so quickly. ‘That is just something to open you up and get you ready’ Nicole whispered menacingly into my ear. ‘Turn your head and look at me slut’ Sandra commanded. I lifted my head and saw that Sandra was putting on the harness for an impossibly large strap-on cock. A much smaller dildo faced inwards which Sandra pushed deep inside herself before tightening the straps on the harness very securely. She walked out of my field of vision and a few seconds later I felt the butt plug being removed from my ass and then her giant phallus thrust deep inside me. The initial pain was almost unbearable as she filled me up completely. After a few small strokes she began to work her cock deep inside me with powerful strokes, Nicole removed my gag and pushed her hot cock deep down my throat again. It was impossible to do anything about the situation except to try to relax and, if possible, enjoy it. After the initial pain, my ass had become used to the girth and length of Sandra’s strap-on and I was indeed starting to enjoy myself. She must have sensed how I was feeling so she withdrew her cock then walked around to my head and, taking over from Nicole, pushed her cock into my mouth. Her cock was of course dripping with my ass juices and much bigger than Nicole’s cock. My mouth was stretched open as wide as it would go and I was gagging and choking unable to resist the forced penetration.
Sandra slowly withdrew her cock from my mouth and then unbuckled the harness of the strap-on from around her waist and thighs. Finally she pulled the inward facing dildo out of her cunt, which was sticky and glistening with her juices. ‘Clean it’ she commanded. Doing as I was told, I licked every inch of the dildo with my tongue until every trace of her was removed.