planned mistake

When two young, financially unstable people decide "Whoopy let's have a kid" after a couple pints

Mother: No! Don't be silly you weren't a mistake!

Child: Yes I was Deborah. I may have been a planned mistake, but a mistake nevertheless and deep down you know it.

Gremlinesque

Obscure or unnatural contortions, displayed through the use of muscles in the face

My sisters face is Gremlinesque