Should seller file for a quit claim

[Thomas Johnson]

Hi guys, I am attempting to get a property under contract to wholesale. The property has the seller and his niece on title. Both are in different states. The seller is ready to move forward with signing the contract, however the niece has been stalling and trying to think of every excuse to sign the p&s agreement via docusign. The seller and I both know that if she doesn't sign, we cannot move forward. I asked the seller would he be willing to file for a quit claim deed to have her removed from title. If she is not cooperating with signing the contract, I'm sure there will be more issues when it's time to close. What would you guys do if you were faced with this challenge?