Then again Lestilaut needs a specific kind of woman, to keep his artistic outbursts under some kind of control, so maybe his parents were afraid, a non-dunkelfelgerian woman might lack the forcefulness and fortitude to keep their son in check.

Wife keeps (Gremlin) Lestilaut in check

Husband keeps (Gremlin) Rozemyne in check

Lestilaut and Roz would be the combination of two unchecked gremlins

Guess Hanelore was right about him not being the guy.