No, she cannot sell without his consent. She needs to get a lawyer, rush her butt to court and get a support order and an order forcing him to sell. I wanted to keep my house and my ex tried to smoke me out by withholding money. I took a draw on my credit card to pay for a lawyer, who got me many, many more times the amount of money I spent on hiring him. He also got me an order forcing my ex to comply with my refinance, that is, he was forced to sign the quit claim deed signing the house over to me in exchange for his share of the equity. She needs a lawyer, stat.