Vested Mortgage We Have Paid My Mom's Mortgage For 1 Year And Lived There. Can We Take Advantage Of That $ If We Now Buy It?

We have paid my mom's mortgage for 1 year and lived there. Can we take advantage of that $ if we now buy it? - vested mortgage

My husband and I lived with her mother for a year and pay the mortgage at this time. Now he wants to sell us. Investing, we can have no interest in that when we buy the house on the year of the mortgage we pay?