Should Christina use her entire early inheritance to pay down the mortgage?

Q. I have a question about my upcoming early inheritance . My parents, who are in their 80s, are gifting me $500,000. My husband and I, both in our 40s, have no debt and own a home worth $900,000 with a $450,000 mortgage left on it. I just started a job with a defined benefit pension plan (DBPP) and my husband has no pension. We have about $30,...