Just tell them that they are not enough for you. Better yet: put it in their name, so they can never forget just how inadequate they really are. After all, if you are not good enough for your mother, then how can you be good enough for anyone else?
And she [Rachel] called his name Joseph, saying: ‘May the LORD add to me another son.’ (Gen. 30:24)
Is it any wonder that Joseph is an insecure child?