Meiwenn has very openly talked about their relationship in interviews & many of the films she has directed incorporate autobiographical aspects.

Her being very open about it is also the impression I got.

she talked about how they knew eachother for about a year before she really fell in love with him and they began dating, which puts her at 13 (12 plus a year of knowing each other).

Okay thank you. It’s unfortunate that these things are so hard to find, but I’ll take your word for it then.

My personal opinion is that they got married after she was already pregnant

This part seems to be firmly established. Every report I saw says marriage at the end of 1992, birth in January.

had likely been intimate for years prior to the marriage at 16. I think the story that he waited until she was 15 comes from the international push back they received after luc became famous and people found out about the relationship.

That sounds plausible.

Thanks for sharing!