NAH BUT... 1. If she ever finds out, she will be devastated 2. She will wonder how you afforded it 3. If she thinks you got it via a loan, then she won't likely be happy to start your marriage with debt like that. Then she ends up partially paying for her own ring 4. There is something inherently WRONG about a father even suggesting paying for the ring

Suggestions: 1. Politely but firmly decline his offer 2. Look for a unique vintage (seek out Art Deco or EdwardianEdwardian) , which are often way below market value for the diamond & totally one of a kind 3. Seek a store that does layaway. Mine was at a place that offers up to a year interest-free to pay it off. Not a loan! 4. If you don't care for that, buy a smaller ring & tell her you will upgrade when you can afford it... & that you'd like to incorporate the stone(s) from the original ring into the upgrade as well, or turn the first one into a cocktail ring after you get a new one.

Good luck!