My son's girlfriend didn't know basic facts about him for YEARS and I'm losing it

So I've been a mom for almost 30 years and honestly, my son's always been kind of a mystery. Lately I've been genuinely worried about what kind of woman would put up with him, like actually losing sleep over it. I told him multiple times that if he treated his future wife like this, divorce would be the LEAST of his problems. But then I was like... does he even act this weird around HER? And then I saw a photo of his girlfriend and she's adorable and pretty, which somehow made me feel even MORE guilty.

Finally got to meet her at the engagement dinner. My husband and I took one look at each other and we were like... yeah. Team girlfriend all the way.

They've been dating for 7 YEARS. Seven years. And apparently they didn't know each other's blood types for FIVE of those years. I heard they're the same age, so I asked why she calls him 'oppa' (older brother). Turns out my son has an earlier birthday in the year, so she didn't find that out until years into dating. And get this: she STILL calls him that because he likes it and she just... never bothered to change it. That's when I realized my son has been telling people he's a year YOUNGER than he actually is. Like casually walking around lying about his age.

I asked her why she even started dating him when she doesn't talk to him (he's quiet sometimes, it drives me insane). She just smiled and said 'Oppa is nice because he doesn't know!' Like that's... not the compliment you think it is, sweetie.

I got curious and asked when they first met and why. 'Our personalities match,' she says. Then she gives me an EXAMPLE. Turns out they only RECENTLY found out what each other's parents do for a living. She told my son her parents were teachers. They're UNIVERSITY PROFESSORS. So I ask her what she knows about my husband and me. Apparently my husband works 'at a phone company' (he's an executive at a major electronics conglomerate) and I'm 'studying something new as a mature student' (I'm a high school teacher). She said his dad works at the company and his mom works at a school and they 'come home early,' which is technically true but also WILDLY underselling it.

Then she adds: 'But oppa is warm, so that's good.'

And honestly? I have NO idea what that means. My son is warm? I don't even know what she's talking about anymore.