Married But Bisexual

Every chance I get, I drive over to Sam's place and fuck the shit out of the twenty two year old.
He's the youngest of six siblings, his sister who I'm married to, being the oldest.
We first began having sex just before I said 'I do' in the registery office. And when I say just before, I actually mean the morning of my wedding to his sister. He'd stayed overnight at my flat and he'd given me a blow job before we went to separate bedrooms.
The morning I married his sister, I fucked Sam in the back of my car down a country lane on the way into town. Unable to resist his suggestion of me fucking him over a low stone wall, I was about to slide my cock up his beautiful arsehole but it began raining hard, so I fucked him on the back seat of my car instead.
He must have had my spunk still up his arsehole as I tied the knot.
As soon as we got back from our honeymoon I took Sam back to that stone wall and fucked him, twice.
It's been eight months since I got married and in that time I've fucked my wife's brother a couple of hundred times. Sometimes fucking Sam twice in a day.