My Mum's Best Friend

When I was 17 my parents used to have lots of casual BBQs with their friends & Neighbours.
One one occasion my Mum's best friend decided to nip back home to grab some more food & wine. My Mum quickly told me to go along to help carry things. My Mum's friend was in her mid 30s, single and was a School Teacher in the next town. When we got to her house, she decided that she needed to get changed in to a different dress. When she came down, she was wearing a low cut skater dress, that really showed her body and breasts off nicely.
At this point, she caught me staring at her breasts for slightly too long. I remember feeling very embarrassed. Instead of getting angry, she asked me if I liked them & if I wanted to see them? I said yes, without another word she dropped the dress to the floor & removed her Bra. She was 5'5 and had an average build, but had lovely long red hair. Soon I was not only touching her breasts, but was running my hands over her body.
I removed her knickers & started exploring her, she guided me to her clit & showed me how to pleasure her & loved it when my tongue was inside her. Before long she was quivering with pleasure on her living room floor.
She lay on her back & took me inside her & told me to ride her hard. Being 17 & inexperienced I came quite quickly, but was so turned on by the experience.
We then tidied ourselves up & went back to the BBQ, no one noticed we had been away so long.
From then on we met regularly for the next few months for sex. My Mother never ever knew.......