TL;DR: Teacher wants to invest in my company 😲

So, just this morning as I headed to class (still in school, 17 years old, from Germany) someone tapped me from behind - a female teacher whom I've only seen a few times (She is a really nice and friendly teacher who teaches economics)
She asked me: Aren't you the young businessman? I've seen your interview, fantastic! (Background info: I recently founded my second firm (Webdevelopment, Design and Marketing) and was quite often in the media (local newspaper, television, radio))
Quite unsure, I responded: "yeah, right".
Promptly she asked: "Is there some way I can invest in your company? Perhaps in stocks?" (Of course we can't offer stocks, we're just a small local company lol)
Me: "There always is a way I guess?" (I was extremely grateful but didn't know how to respond)
Her: "Great! Would you mind sending me an email with your contact info?"

What the fuck just happened. 😂