King's Bounty - artifacts, wives etc.

[ganjatron]

The quest for the frog wife was one of the first ones I did, and I decided not to ask her to marry me. Since then, I've met Rina, Mirabella, the dwarven one, and Xeona.

Is there any way to get the frog as your wife if you didn't ask her to marry you upon the quest completion? Is she hiding out at some castle or something, or did I miss my chance? As a mage, I prefer the int bonus.