He prepares you for penetration

Your father sits in the lounge chair, pulling you onto his lap so your back is pressed against his. His unnaturally large cock, still only half erect, lies between your legs. It's so thick that it forces you to spread your legs already.

"Phoebe, dear, I'm going to get you ready for this, but if you don't cooperate I'm just going to gag you and do it the painful way. My cock is 14 inches erect, and unlike other guys my size, I'm rock solid, so if we don't prepare you, you could get injured," he says in a calm voice, as he begins to massage your breasts under your bra.

You can't do much but groan in response - the two impacts to your head has caused your head to throb in pain and your limbs feel weak.

"You hit her too hard," your mother sighs, "she won't be able to enjoy her first time."
"You're not looking closely enough, Jennifer - she's leaking juices all over me," your father grins.

Indeed, the warm feeling from when you got hit is lingering - it feels almost similar to when precum would come out when you were a male, but more intense.

Your father begins to move his hips, gently letting his cock rub against your slit. His cock was throbbing already as it got harder, bigger, and rose to full attention. Even though Phoebe's thighs are thin, it still horrifies you that his cock is now almost the same size in length and width. You find yourself twisting uncontrollably in discomfort, unable to process this alien feeling between your legs.

Your father's breath feels heavy against your sensitive ears. His hands slide down your body, grabbing your ass. You flinch, thinking he's already going to start, but instead he begins to slide you his cock up and down your abdomen. You whimper as you see the throbbing cock head reach up above your navel, terrified of what it might do to you should it go inside.