Thanks for the comments. To give more context, we're in the same field, and while we haven't contacted each other personally, I saw her a couple of times at other colleagues' wedding parties and ceremonies just to exchange greetings. Her wedding was in another city—it would've taken over 1.5 hours by public transport—so my dad drove me there. Since he was waiting for me, I just watched the ceremony, took photos, and instead of eating, I traded my meal coupon for a return gift and rushed out. Because I put in that much effort for her wedding, I think that's why I'm feeling like I want to get my money's worth. Thanks for the advice.

------------------------ Back when we worked together, we were decently close for about 5 years. I changed jobs 10 years ago. Two years before I left, she got married and I gave 100k won as a wedding gift. I got a hand cream as a return gift. A year after her wedding, she had her first kid, so I gave her a 50k won gift and even went to visit the baby. Since switching jobs, we haven't met once. I found out she had a second child 3 years later through social media and just left a congratulatory comment. I'm getting married in February, and I'm wondering if it's right to send an invite. I've been posting about my wedding prep on SNS, but she hasn't left any comments or DMs, so I'm worried if it's a nuisance to reach out just to get back the money I spent 12 years ago. (Summary: Left 10 years ago. Worked together for 5 years. Gave 100k for her wedding 12 years ago. Gave a 50k gift for her first child. Haven't met once since leaving.)