WOW - are you sure your H isn't with my ex H's maggot? They sure sound like the same B!TCH to me.
You, my friend are now in the driver's seat. But you've got to keep control of the car before it backtracks or spins out of control. That was one excellent opportunity for your H to see firsthand what he might be getting into. And you, my dear, handled it wonderfully.
Now, don't sweat. Don't phone or text or email him. I know it will be difficult but please sit back and let him him suffer. And when he does contact you - don't mention the D papers, or the OW or why you want him back or that you love him or that son misses him. You just be the sweet girl he would WANT to come back to. If, for example, he tells you about his road trip - you just say "that's nice", NOT "did she go too?". See what I mean? Pretend it doesn't matter what he does, even if it is tearing you up inside - act "As If". As if it doesn't matter to you - you need to get your nails done. And you have plans. La te da....
Keep it up, Sanderika. Don't let that b!tch get the better of you. Your H is being tugged so don't tug back. Let him feel suffocated and relief is at your place.