Aaaaah I'm screeching in joy! I thought she'd be paired with the blondie but then the former king proposed & she freaking accepted!!!! I'm glad she was an adult in her previous life so she's not a gullible or short-sighted teenager!
Imagine her 'family's' surprise if they know who wants her as a wife! Will they still dare to kill the former king with that threat? That said, I hope she can reform her own contract with the spider... if not, just work with the fairies while the spider was subjugated or something.
Edit: Some people who commented before me below had so much negativity & not thinking thoroughly. First of all, she was an adult when she died previously & she was born with an adult memory & experience in her. She wasn't manipulated & she made a very consenting & conscious decision to save herself via agreeing to marry him. Second of all, this world was at least a medieval age, so at fifteen we all can agree that it's normal for women to be engaged or married already. Third of all, even if the former king's a lot older, he didn't propose because he thought with his d*ck so this is far from p*dophilia, & he's probably still single so he didn't intend to make her his concubine but a (legal) wife. So, he proposed to protect her, as the national treasure & Divine Embroidery Seamstress, who also has the same power as the first Seamstress. He's basically doing her a priceless favour in order to protect her from harm similar to what her 'family' had been doing to her. Fourth of all, can you imagine if he didn't propose right then & there? The current king (which will appear in the future?) probably, if he got wind of her... might take her instead & make her his concubine, which is a NOPE. Fifth of all, if the much younger Marquis Blondie proposed to her instead of the former king, her hurdle would be a lot harder to overcome & people could still sabotage their probable relationship (like her 'father' had been assuming & thus plotting for against her). So the proposal from the former king is a better, no, BEST option for her security right now. It's a mutual & symbiotic relationship even if there's no love built in between them. She can protect the former king with her clothes-making, & he can protect her with his status as the former king!
So, all in all, don't jump to assumptions too quickly & sit tight & calm your b*obs pronto y'all.