Work Colleagues Son Dilemma

A few weeks ago I attended a barbecue at a work colleagues home.
A colleague who I'd not been working with for long, sharing a van to work all over the country.
The barbecue went well and I'd had a few beers, when my colleague said his son had arrived.
When he walked into the back garden, I couldn't believe my eyes.
The young twenty year old, just so happened to be the young man I'd been fucking for over three months.
We'd met at a very well known gay cruising place, where he'd sucked me off on our first time together.
We swapped numbers that day and two days later I met him at a place I know which overlooks our city.
After lots of kissing and oral sex both ways, I fucked him over the bonnet of his car as the lights in the city were coming on.
He took a damn hard fucking that evening, then licked and sucked my dick clean once I'd cum up him, filling the condom I wore.
I sucked him afterwards, sharing his cum by kissing him once he'd ejaculated in my mouth.
A few days later we both got tested (I paid) and a few days after that, both getting the all clear, I fucked him again overlooking the city. Only I flooded his arsehole with my cum, twice.
Every chance we got from then on we had sex. And eventually I invited him back to my place.
We've fucked countless times in the three months we've been involved together, and he's told me several times he'd love to move in with me.
The 'but' part however, is his parents, but especially his father have no idea he's bisexual.
Indeed he's told me his father absolutely hates gay men.
Luckily for me I'd not told his dad working with him, that I enjoy fucking younger men.
When we met at the barbecue, my colleagues son acted like it was our first time meeting each other, so I played along obviously, even though it was hard not to fuck his gorgeous arse.
This is where it gets a little tricky.
A week ago I'd fucked my young lover in my bed and was receiving a clean up blow job. He stopped and told me he was going to tell his dad about his sexuality after they got back from their three weeks away.
He not only said that, but he said again he'd love to move in. If not then he's telling his parents anyway that he's bisexual.
My dilemma is I'd love him to move in with me, but don't see how I can still work with his father. And I need the job.