Can my wife hold up the sale of our house if her name is not on the mortgage or deed?

I live in Massachusetts and my wife and I are divorcing. Out marriage broke down 6 months ago and she moved out. I have always paid the mortgage and expenses and continue to do so now that we have decided to divorce. I was fortunate to find a buyer for my home and have secured a closing date. I was surprised when my wife served me with divorce summons a day before our closing. When I called her alarmed, she agreed to cancell the summons, but that we both would need to appear before the specific judge who signed the summons. We won't be able to appear before the judge before the planned closing of the house. My question is whether or not the original summons can cause the closing to stop.