<human>: Can you condense the text into a few key points?

My mom had commercial property sold through an auction several months ago (lawyer's advice). The property was owned jointly with my dad before divorce, and my dad had several liens on it. My mom paid off the top two liens so she would be the primary lienholder.

When the property sold she received her lien part and the rest of the money was held. My mom's lawyer  is trying to win the rest of the money away from the junior lien holders. They're stuck waiting for the bank's lawyers to write the interplead. It's been a few months now and my mom is getting impatient; driving me and her lawyer crazy.
<bot>: How long does it take for a lawyer to write an interplead? What can you do if it takes too long? This is Massachusetts.