Lisa has a nightmare

A soft knocking at the door, ugh, not again. I tried to ignore it, maybe she will go away. Another soft knock, but this time the door opens slightly and a soft voice squeaks, “Mommy?”
“She’s asleep Lisa, what’s wrong?” I replied, feigning sincerity, not because I didn’t care but because this was becoming a nightly occurrence.
“I had a bad dream, I wanted to know if I could lay down with you guys?”
As expected… but of course, as my wife had often pointed out, I could never say no to my princess. She had me wrapped around her little finger.
“Sure, but you’ll have to lay next to me so you don’t wake up your mother.”
I heard the door shut and little feet navigate across the dark floor and climb up into the bed. She quickly hogged my blanket and cuddled up to me. At age 13 she was shorter than most of the other girls in her class but slightly chubbier. She pulled my arm around her stomach and sighed a bit of relief. We soon both fell asleep.
Sometime in the night, I awoke slightly… I was on my back now, having shifted in my sleep, and my cock was hard rubbing against my pajamas. My eyes remained closed, hoping to go back to sleep and return to whatever sexual bliss made this, but in the process I started to wake up and become more aware of my surroundings.
Something was pressing against my cock from outside my pajamas… no, rubbing it… I laid there, still for a bit, and finally realized it was lisa’s hand rubbing my hard cock. Not sexually as much as exploratory as though on a learning mission. Fear coursed through my brain, while excitement ran through my body.