So my wife and I have been in a cuckold relationship for quite a few years. Recently we have been thinking about more kinky partners for her and we both mutually agreed her fucking my dad was the most intense way to be cuckolded and it helps she is really attracted to him and is very comfortable with him. We have tried some tame ways of encouraging him to look at her and she will wear flattering clothes around him and particularly bikinis during the summer when we are in the garden. A few months ago he came round to watch the football with me then we were all drinking in the garden. I jokingly suggested we get in the hot tub and my wife caught my eye and winked at me. Clearly she thought this was a good idea.and was already in her bikini.

We all got in but my dad had no swim shorts so just went in with his white boxers. It was obvious straight away that these became almost transparent and we could all see his absolutely massive semi erect cock. He couldn't keep his eyes off my wife and my cock was absolutely straining at my full 4"! My wife kept eyeing us both up and was getting more and more flirtatious with him complementing him on his body and how well toned he was and even suggesting I could take some tips from my dad as he was so "well developed"! She smirked when she said that and I am sure her eyes lingered over his crotch, which he definitely caught on to. He smiled awkwardly at her and replied that he had no complaints about what he had been given. We all got a bit quiet for a while when my wife told me she would like more wine and I should get my dad a beer. When I stood up they both immediately seen my erect penis. Anyone with a small cock will know that having a tiny cock can mean you stick straight out when erect and they both had a little giggle at my situation.

Noting the mood between us all I tried to give them as much time as possible alone and was desperately trying to listen to them when I was in the kitchen. Unfortunately it was too far away to hear them well and they were both very quiet. I eventually couldn't wait any longer so took the drinks out and tried my best to hide my boner from them but it was difficult with my hands full and having to climb into the tub. When I got back though I was shocked to see my wife with her back to my dad between his legs as he rubbed her shoulders. She was clearly very relaxed and had her eyes shut leaning her head on his well defined chest. I couldn't help feel like I was intruding and that they were the couple and not me and my wife. I placed the drinks down and my dad just smiled at me and my wife lazily opened her eyes and blew me a kiss.

Eventually my dad was stroking further and further down her body until I am sure he was gently stroking her breasts under the water. I couldn't speak and was painfully erect watching my wife and dad enjoy each others bodies. She was squirming against his lap and she eventually moved further up until she was effectively sitting in his lap. She was clearly grinding her ass against his cock and he was nuzzling his face into her neck. They both looked like they were so into it and her neck and chest were very flushed like when she has sex. Eventually my wife's eyes shot open and she clearly had felt something and she looked in my eyes and went an even deeper shade of red. My dad sorted of coughed and said how much he had enjoyed rubbing her and it was probably time for bed. He excused himself and stood up when both wife and I were greated with the biggest erect cock we'd ever seen. It was truly magnificent! Neither of us could look him in the eye as he said his goodbyes as all we could do was stare open mouthed at his cock that was now at eye level with us as he stood up. I was both in awe and humiliated knowing that we all know he was twice my size and more and that my wife had just seconds ago had that pressed against her. I almost wanted to push my wife towards him and suggest she went with him to his bed and I kind of regret not doing so now.

I will finish what happens in another post.