"Can you show me your tits?"

I say after thinking for a moment.

Millie gives me a naughty look, then, as she looks me straight in the eyes she reaches her fingers in under the thin blue straps of her swim suit that covers her big breasts and pushes them aside, revealing her big tits in all their glory.

I just sit there and stare at my step-mom's big tits for several seconds. They look really nice and firm, and her nipples are pointy and surrounded by light brown aerolas.

Millie smiles as she sees my reaction, then says:

"So, I take it you like them?"

"They are amazing." I say in reply without taking my eyes off my step-mom's big tits.

Millie sits there for a while longer letting me enjoy the eye full, then reaches across and touches my arm, saying:

"I'll leave them out for your visual enjoyment."

I smile a big smile and look Millie in the eyes, for a while without saying anything, then Millie says:

"Okay, your turn, do you go for truth or dare?"

"Dare." I reply.

"I was hoping you'd say that." Millie says and smiles, then continues:

"Let me see your dick."

I am a bit shocked hearing this, looking at Millie to make sure I heard correctly and she nods and points towards my crotch where my hard cock is creating a visible bulge.

I slowly stand up in front of Millie, she leans back, her big tits still out, and then I pull my swimming shorts off revealing my erection.

Millie looks at my cock, straightening up a bit to get closer to it, looking at it from both sides then looking up at me saying:

"You got a nice cock, Matt. You will make many women happy with that before you find that special girl."

I don't reply, instead I look down at my step-mom's face next to my rock hard cock, knowing that if I just twist my hips a little then my cock will hit her in the face.

Millie admires my cock for a few more seconds, then looks up at me saying:

"I think your cock is actually a bit bigger than your dad's."

She then straightens up, looks at me and says:

"I go for dare."