@Bonjourfreddie i personally would be fine with it, its clear the ops intentions were good and i would prefer to see the dress, the venue, the heartfelt vows etc than them signing the register. All those things are what make a wedding, and ok it wouldn't be a legal wedding but it would be a lovely day and that would be the day i would want to be involved in.
But her parents and in-laws are not you, and they clearly weren't happy, were they?
Whether that was because she lied to them, or because they weren't going to see her get married, or both, we can only speculate.
But they clearly did not feel OK with it at all.
On what basis can you say "it's clear that OP's intentions were good"?
She lied, she took money under false pretences, she deeply hurt and upset the people closest to her and her husband, she disrespected them, and she tried to coerce a third party into risking their own reputation and standards by forcing them to lie for her.
How can you blithely say that you're so sure her intentions were good? Her actions are all we can go on, and they sure as hell weren't.