Would a Husband's money was deposited in an Escrow Acct in he and wife's names, would this make the money "marital property"?

My Husband sold his parents house he inherited, and deposited the proceeds into an escrow account, in both our names, at the Title Co., handling the sale of the home. The Title Co. does require, a written, signed by both of us and notarized, written agreement, which authorizes the Title Co., to distribute the money, in specified amounts, to either one or both of us. Does that make this money, "marital property"?