I have received a oil and gas land lease and we did not sign it but her sisters did. the gas company is drilling. What can we do to get the same lease

It sounds like you received division orders from the oil and gas company and that you need to sign them.  Before doing so, you should hire an oil and gas attorney and have them review the division orders, and any mineral deed or transfer document, to make sure your interest is protected, properly transferred and correctly stated in the division order. Good luck to you. Sincerely, Kevin Spencer www.spencerlawpc.com