Motivated seller! Two people own property.

[Bryan Barth]

Alright guys, had a motivated seller contact me off my direct. She's motivated to sell the house at the moment due to her family situation. She and her father bought the house 12 years ago. She's in dire straits ,and the father is in a nursing home in Fort Worth. BTW we're in Houston. The sister of the seller, has power of attorney over the father on paper. But the father is completely cognizant and can still sign. I'm meeting with the seller today and I've got a great offer for her. I know I need both signatures on the contract to be able to execute. How would you guys proceed to get this situation done? 

Thanks in advance

Bryan