Swimming with MIL 2

My cock was still quite hard as I walked down to the pool and although the shorts did their best it was clear that I was a happy lad..
Mil looked thrilled to see me, so much so she swam up to the edge of the pool and spent 5 mins looking up at me, right at short level but only talking about family stuff and not the fact 8 inches of son in law cock were in her face.. 8 inches that were slowly getting hard again..
I had no choice but to jump in and join them.
Now MIL isnt slim, she has some extra land, so I bumped and rubbed and pushed and squeezed every chance I got thinking I'm all subtle and shit. Mr Cock was still in a semi state and gagging for a rub..
Im not sure if she gave in, or just wanted to wind me up but she put babe in front of her and pushed heself against me, my arms under her arm pits and boucned babe up and down in the water. This did 2 things, it rubbed her arse against my cock and her tits, being between my arms, bounched and jiggled and rubbed...

Oh My fucking god... Instant stiffy and she must have noticed. I'm not talking a small bump, This was a teenagers raging hardon. Like a fucking iron peg ans shes wiggling her fat MIL arse on it... One hand reached to my leg and stayed there............