Making My Decision

Eight months ago my wife, who's four years older than myself, booked two male escorts to fuck me, for Her thirtieth birthday.
She watched and vidoed me sucking their dicks and receiving their cocks deep inside my arsehole.
It's something she'd wanted to witness and enjoy ever since we got together. Mainly because she says I have a perfect fuckable arse.
After the hour which she'd paid for, one of the escorts left, but the older of the two stayed and we all continued to have sex.
He wasn't really into women, but because it was my wife's birthday, he and I both fucked my wife together.
Later on with my wife taking a shower, he passed me his personal number and said he'd love to fuck me alone.
My wife doesn't know this, but for the last eight months I've been having sex with the older escort.
I visit his home two or three times a week, now that he's stopped being an escort.
The sex is incredibly good, but so is our growing relationship. He's in his late forties and has a super high libido. He tells me we're absolutely perfect together as a couple and wants me to move in with him.
I'm at the stage where I'm going to have to choose who I want to spend my life with.
My wife is very career driven and has recently (A month ago) taken on a role which means she travels a lot. And I now practically live on my own.
It's time I think.