"I don't know"

I stammer. This whole situation has really overwhelmed me. When I planned the date I had hoped that things would end this way, but now we are here, both Millie and myself naked and about to fuck, but all my fantasies about my step-mom suddenly coming real is almost too much for me. Millie puts her hand on my arm, squeezing it, saying:

"Matt, sweetie, relax and don't be nervous, okay."

I look at her with what must be puppy eyes and she nods saying:

"We got all night." She takes a step closer to me, her naked body pushing against mine. Her hand goes to my dick and she holds it for a second, like she is measuring it and she says:

"I cannot wait to have this monster stretch me."

She starts jerking it slowly, our lips meet and we share a kiss. Then she pulls back from me again and says:

"Now, Matt, tell me what you want to do. Be a man and take charge."