It's really difficult to refuse an invite to a family wedding but I've done it once.
A cousin got married the other side of the UK.
It involved going away for two nights and a lot of hassle and expense.
We did it as the couple met in the area through work and lived in it so fair enough.
The couple divorce. The 'bride' moves home very near to us (and the rest of her family) and meets a local guy-whose family also live near us.
Crucially, there is no longer ANY real perceptible link to the area the bride and groom to the original wedding city. None whatsoever. Everybody would have been less inconvenienced had they married closer to home.
Nevertheless, for some reason, the wedding is held in the same town as the first.
Not only did I think this was a bit strange (though never said so) but it was a firm, immediate refusal.
Sorry, love, I know it's your wedding and you can do what you like but equally I think that you're taking the piss and I can politely refuse your kind invite.