Family owns our home

My husband bought the house from family for 300k before we were together and once we got married he put my name on the deed. My in-laws bought the house from us a few years ago because we fell on tough times and wanted to relieve us of a mortgage payment. They paid the remainder of what was owed on the house $180k. The house remains in their name to this date. I would like to sell the house, pay back my in-laws, and split the difference, but my husband will likely not agree to this. What are my options?