I think if you wear your wife's family she might git pissed and you will probably end up in the looney bin like Ed Gein.

Now that that is out of the way i have no useful info for you. But i think it is a nice gesture to where the tartan of your wifes family I think it shows her that you think her name and where she comes from is important to you. May be meaningful to her especially if she is taking your surname.