Blowjob Plus Finger

As she continues pulling my shorts down she says, "Lets start this off slow so you know what you are walking into." Shen then removes both my shorts and my boxers leaving my exposed six inch cock. She then moves her mouth close to the head and gives it a slight lick before she starts taking half of the shaft into her mouth. She continues gliding her mouth up and down for some time until an unexpected finger finds its way to my anus. As soon as her finger touched there I jumped a bit only to her saying, "Relax ill go slow at first just go with it." So with me feeling reassured I lowered my guard allowing her to run her fingers at the entrance of my backdoor. As she starts moving her fingers in circles tracing along the edge of my anus she stops giving me head only for her to take one of her fingers and stick it in her mouth getting it nice and wet. Right after that she continues sucking on my cock but brings the finger to my anus lightly going over the entrance dipping it in just a bit. But right as I start getting comfortable she plunges her finger as far as it goes into my anus. I would have almost jumped right off the bed if not for my gorgeous sister giving me head. But she does not stop she just chuckles and continues working my shaft with her tongue and moving her finger in and out and a slow pace.