I'd leave those panties in while I lick around them and all in and on her pussy. Two hours is a long time so I'd feed her my cock and eat her pussy from every angle. After I've throughly devoured her juices I'd focus on her tits and kissing her while rubbing my head up her pissy lips. Then I'd spread her legs wide as I bottom out my cock in her hard till I fill her pussy with every drop of cum in me. After finishing I'd pull out slow keep all the cum in her then sliding her panties back on so it can all be kept in for you to enjoy the seconds.