Can a lender of a car go after the real estate property owned by wife & husband if they can't pay?

My friend was diagnosed with colon cancer a year ago. He recently bought an expensive truck (without a co-signer/co-maker). However, he owns 3 more cars + 1 house (conjugal property). My question is - if he died from his current sickness, will the lender of the truck (credit union) go after the property of my friend? or will they just reposses the truck? His wife is thinking that since her name is not in the contract of the truck, she won't have any problem - her credit won't be affected. Is she correct? Can the credit union put a lien of the real estate property of my wife's friend? Thanks.