Make sure you have your shitter all lubed up before you call. Your dirty big sister is so eager to use her new strapon that she’s not going to take the time to grease up your asshole for you. She wants to plug in her toy as fast as she can.
You will never know how your big sis is going to fuck your ass. She may want to do it nice and slow to give you a good sensuous screw as if she’s making love to your sweet butt. Or she may pound your tight ass brutally hard like you’re her prison bitch. Either way, getting fucked by your sister’s strapon will make your dick so hard you might bust your nut faster than you ever thought possible.
Let your sister have her way with you. I think you will enjoy it even if you’ve never had anal sex before. Who better to have a first time experience than with your very own sister? She knows what’s good for you and she definitely knows what makes her pussy wet. The act of screwing her little brother is what makes your big sis very happy.