This really happened a little while ago.
My X wife came over to see my new living quarters. Let me tell you first. We get along exceptionally well now.
Well she took the grand tour by herself as I was having my coffee.
When she came out of my bedroom, she was holding my new Candy Thermometer, and asked just what I used it for. (I used to examine her, and she is very Anal.) I told her to take Rectal Temperatures with, what else. She said she had never seen one so large before.
Well she had a cup of coffee, and we chatted about my new thermometer.
One thing led to another and before long she wanted to try it out and see just how it felt.
I must tell all of you "D" is very petite with big boobs (36D), and a bottom that is out of this world.
I told her to get undressed and I would get things ready for her temp taking. Now I use a tip from a Hemorrhoid tube on my KY jelly. I also use Ky rather than Vaseline.
She came out in her bra and panties, what a sight' I hadn't seen in some time. The thermometer was on the coffee table along with the Ky. As I looked at her I could tell she was a little scared and excited at the same time. Her nipples were very hard, a sure way to tell on her.
I said she would have to be across my lap for this, and she agreed. As she stood in front of me, I put my hands to her panties and pulled them down and saw them drop to the floor, and she stepped out of them. She still shaves her pubic area and it looked real good.
I positioned her across my lap, and just paused for a minute to take in the view. Then gently spread open her cheeks with my left hand and saw her little brown anus winking at me. I took the tube of KY with the tip and gently pushed it into her butt hole, feeling her squeeze on it as she said this is new.
Yup, lube gets in faster. I removed the tip and inserted my finger to make sure she was well lubed, she was.
Still holding her cheeks spread open, I gently started to insert the large tip of the thermometer, I could see her squirm and tighten up her bottom a little and just said relax.
Well some curse words came out like, Holy Shit! that is Big!
I said want to stop, and her reply was no! Just please go slowly. Finally I got the whole tip inside and she was beginning to feel the girth of it, and I could see her tiny hole relaxing and letting the thermometer enter her even further. I got it in about half way and started to move it in and out like I was having Anal Sex with her(mmmmmmm another story)she enjoyed this very much. I left it in oh, about 10 minutes and finally took it out.
She was still across my lap for a few minutes and I could feel her wetness on my shorts. She finally got off and went into the bathroom to clean up.
She asked if I had any other new things. I may give her an Enema with my new equipment later.