She's Always On Me For Sex

My boss is a forty four year old female, whose husband apparently doesn't fuck her anymore.
She's attractive, but he's lost his mojo.
From my first day working at the company (Her husband's company), she's been sexual towards me. And after only a few weeks she cornered me in her office.
Telling me I needed to fuck her, she lifted her skirt to show me she had no knickers on and practically dragged my trousers and boxers off.
Laying back on her desk, my boss pulled me into her, took hold of my cock and all but used me like a dildo.
I swear I was afraid of her, so I just kind of stood like a statue with her using me.
Only when she began cumming on my cock did I start to really fuck her. From them on I took some control back and pushed her right down.
Fucking her like that, is how her husband caught us.
He didn't bat an eye lid and said something to her, ignoring me, about an order.
When he was leaving the office, he made a comment "Keep her happy boy".
Now each month he gives me a bonus in my pay.
There isn't anything we haven't done now eighteen months on, and I'm really fond of fucking her tight arsehole.
I've even fucked my boss at her home, with her husband in the next room.
I'm just one in a line of young guys who has fucked her, but she told me recently, she'd love me to move in with them.
We'll see.