Mother-in-law's Make-up Brush in my Ass

A good few years ago my wife and I had to stay at her parents house for a few weeks due to us moving home.
One night we were all going out to a family birthday party so as expected the house was bedlam...Everyone wanting a shower and having to iron clothes etc
So I said I'd get showered first to get it out the way.
Now my sister-in-law was still living with her parents at this time and she was a 18 year old blonde and she was HOT!!!!
Now sadly my story doesn't involve her directly, well not this story, but having spent a few weeks living with her I was permanently horny.
She was always getting up in the morning wearing a short tshirt/nightdress with small cotton panties on which always rode up to give me a flash....deliberately...I like to think so.
But anyway,
I went in for my shower and had already decided I was going to wank off first while thinking about my sister-in-law.
So off I went.
I then decided a little anal play would feel even better so starting looking for something to use on my ass and thats when I found my mother-in-law's make-up brush in her make-up bag.
It was about 5" long maybe 2" thick at most but was nice and smooth and nicely tapered.
So there I was in my father-in-laws toilet wanking off with my mother-in-law's make-up brush being fucked up my ass deep and hard while thinking about fucking my sister-in-law.
All the while with them walking and talking only the other side of the door.
Now it didn't take too long for me to shoot a very satisfying hot load while all this was going on.
So I cleaned up and put the make-up brush back in the make-up bag,showered and made way for the next person.
But that's not were it ends.
About an hour or so later and due to the shower still being used by whoever, probably my sister-in-law soaping her amazing body, my mother-in-law had to put her make-up on in the kitchen.
What a thrill I got as I chatted away to her while she used the brush that shortly before had been deep in my ass while I shot a massive load!!