Okay,I figured out what tautology must mean and I looked it up to be sure.
But this is not a tautology because I was talking about what you already know. You already know that your wife and kids have worth (unlike hitler yemach shemo, l’havdil). Not only that, but you know that they have a lot of worth. If such worthy individuals consider you to be a very worthwhile individual, then you clearly are.