Granny Blowjob Challenge - The Best Grandpa Has Never Done! The Grandmas Gone Naughty Again! Grandma's challenge to her daughter to give him a real mature woman blowjob is one that I bet every granny has gone through. It's time for the it to rise to the top and let Grandma know that she can do it when she sees how turned on her husband is. This is the ultimate test of how turned on your wife is when her lover gets his big hard male cock stuck up her vagina. Watch this horny sis take on her challenge as she rides him like a horse, licking and sucking until he explodes all over her face!.