Yes, her earlier husband also took photos with her.
She posted holiday pics with her new one and I'm pretty sure she introduced him as her hubby once somewhere.
Miko was most likely born on August 21, 1993 in Belgium, which would put her at 30 years. That's the most often quoted number you can read about her birthday, which also sounds pretty realistic.
It would mean she started ero-cosplay when she was 20 years old, which is a totally realistic scenario.
When Miko started doing professional shoots with Martin (her recent photographer, from Germany), she still posted pictures taken from her partner back then. These shoots were much more professional and from higher quality than the ones she had with her partner then.
A theory could be that she may have come together with Martin via the photo shoots and perhaps cut ties with her old partner after that.
Another (pretty) mean theory: She realized that she could be more successful with Martin and decided to be together with him. No proof for this anywhere, but that would even more undermine her image.
But who knows, as long as they don't tell the public what happened, we will probably never know the full story.