Carlists win: what would have happened to Isabella?

I was reading about the Carlist Wars, and I've got this doubt: if Carlos had won the war, what could be the fate of Isabella and her sister?
 
I was reading about the Carlist Wars, and I've got this doubt: if Carlos had won the war, what could be the fate of Isabella and her sister?

They could well be useful to marry off - OTL Isabella was married to a cadet branch of the dynasty. She might still be, since this cadet branch has no power of its own, and in itself isn't a threat. Or marry them to foreigners where they're out of the country for good

Best Regards
Grey Wolf
 
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