Say that you'll try it before you make a decision.

"I don't know if I can do that." You finally say. "But for Sarah I should at least try it out."

Sarah sits up and takes the half-empty bottle out of her mouth. "Really?" Not waiting for a response she hugs you tightly. "Thank you Daniel!"

Before you can change you mind, Tanya stands up and offers her hand. "Let's go to the nursery and get you ready then."

"Nursery?" you ask, taking her hand.

"You'll see." Tanya leads you to Sarah's bedroom door. Instead of opening Sarah's door, she takes out a key and unlocks the door on the other side of the hallway. You realise you've never seen this room before.

"This is Sarah's real room." Tanya explains as he pushes the door open.

It really is a nursery. Against one wall is a white cot. Against another is a matching change table. There's a play mat strewn with toys and a table with some half-finished colouring. It takes a moment to register but everything is bigger than it should be. It's all sized for an adult.

As you take it in, Tanya begins undressing you. You instinctively move your hands to stop her.

"Remember you're just a baby." She gently pushes your hands away. "You need to let Mommy do it."

You let her keep going and she soon has you stripped completely naked.

"Up on the changing table." She directs you.

As you do as you are told, Tanya reaches under the table and selects a diaper. You lay down on the soft plastic and wait as she unfolds it. It looks enormous.

"Lift you bum." She directs and slides the diaper under you. "Good boy."

The compliment was delivered so sincerely that it makes you feel warm and tingly.

"These are Sarah's overnight diapers." She explains as she adjusts your penis and then traps it inside the padding. "They are extra thick so they don't need to be changed until morning."

As you climb back down you feel just how thick the diaper is. It forces your thighs apart and makes it hard to walk normally.

Tanya goes to the wardrobe and retrieves a footed sleeper very similar to Sarah's but a pastel blue instead of pink. She fusses with the leak guards of your diaper to make sure it's properly fitted then helps you into the sleeper.

She completes your outfit with a pacifier, clipped to your clothes just like Sarah's then leads you back out to the living room.

As you waddle over to the sofa, Sarah has an enormous smile. "You look adorable too."

You can't help but smile back at her.

As you sit next to her, you see that your coffee has also been replaced with a bottle.