Partly because I was still in shock, but mostly because my dick talked me out of it.In spite of my inner turmoil, I suddenly realised that my cock was...rock hard in my pants, the tent poking up against the wall of our house as I watched my wife get well and truly laid by a teenager speaking volumes about what I really felt beneath the feelings of shock and anger, which seemed suddenly superficial.I ducked my head down closer to the windowsill, for fear of being seen, my eyes wide as I watched. She picked up a sealed packet of condoms, tore it open with her teeth, took the condom and expertly fitted it to me. As her fingers eased it on I gasped. I had to think hard to stop myself ejaculating.Chloe reached over and turned the light off. We could still see each other because the streetlights were showing through the closed curtains. Chloe pulled me beside her. Our heads were at a level. We kissed.“You like my breasts, don’t you, James?”“Yes. But this is the first time I have really seen. I was e******n at the time I was dating a s*****n year old blond haired babe, I had just signed into the Army and was due to ship out after high school graduation. Heidi and I had been dating for about 6 months and the only sexual contact we had was a few short sessions of touchy feeley, she let me caress her breasts under her shirt and bra and feel her pussy only through her panties, she in turn rubbed my cock and balls through my underwear. 3 days after graduation from HS was my appointed. I couldn’t help but smile as I was president of the physics club at school.I stared to feel a little more relaxed as the nerd common point kicked in. I answered easier this time: “physics are awesome, they’re one of my favourite subjects in school, I’m about to start my senior year in high school by the way”. A hush came from around the librarian desk. We both smiled. He then leaned to whisper in my ear: “follow me”. He stood up and walked towards the far side of the library, I followed him.