Mixed up emails of wife and sons teacher

I use gmail and click C and a list of names pop up. I click the one I want and enter the message.
My wife and I send nice messages to each other all the time. We have a very active ** life.
Morning after a very hot night, I was thinking of her coming home early for more of the same.
I told her how nice it was last night, how I like the special ** she had when she nearly feel off me onto the floor. She just got weak when it happened.
Told her I had plans for her tonight, would see if I could nail her to the bed.
I clicked send and waited for an answer. She called later and I ask, did you get my message?
NO, what message? about ** last night and tonight?
NO, what message?
I checked and found I had sent this to my childs teacher. Same first name as my wife. Pure accident.
I fired off a message and apologized for the mistake. ask her to forgive me.
She sent back a message of excitement. She thought I wanted to come over and see her. She is a single woman, she thought my wife and I were divorced. I don't wear a ring due ot my type of work.
We got it cleared up, but she let me know the offer was open if my situation changed.