@Soul26,
No more paying tuition. No more flowers. If he deigns to have dinner out with you, then you go Dutch. No more extras.
If your son is going to act like an ungrateful preschooler, then he gets to be treated like one, and lose out on privileges.
The thing that appalls me the most is the way his godmother was treated. Regardless of whatever beef your son and your ex have with you (presumably over you remarrying), the godmother is wholly innocent in all of it.
As for either of them being angry about you remarrying, that's completely fair in a divorce. Were they both expecting that you would pine away for the rest of your life, begging for the slightest scraps of affection from your ex? Are either or both of them followers of influencers like Andrew Tate, who is nothing more than a frustrated, nasty misogynist?
I hate to break it to them, but once a couple is divorced, they get to date, sleep with, and even marry and/or have children with other people. They're allowed to be happy. Yes, even the women.
Divorced = single.
The relationship ended; your lives did not.
And even if your new husband is someone you cheated on your ex with and your coupling was broadcast during the Super Bowl, you still don't have to pine away forever.
Your son was passive-aggressive and rude. Quite frankly, he was cowardly, just running away rather than telling you no.
This kind of behavior will never fly in an office or the military. If has his sights on either future, it's better that he learns this lesson now, rather than later.
Don't let him walk all over you.