Noooo, Narinn! Have you checked your Recycle Bin?
Could it be that your save file might still be there?
I was so excited about the wedding and the twin girls! :-(
Edited to add:
For your reference, it's not a bad idea to keep different save folders if you're playing different challenges.
For example, when I play a Tournament challenge, I rename my legacy challenge saves folder.
For tournament, my legacy "saves" folder gets renamed to "saves - MLC"
I rename my Tournament challenges folder from "saves - TC" to just "saves"
For the legacy challenge, I do the reverse: "saves" folder --> "saves - TC"
"saves - MLC folder --> "saves"
This also helps me avoid using the wrong gameplay settings for a tournament challenge.
Narinn, I really hope you can recover your save files!