You gag them

While both possibilities have their advantages (in more than one meaning of the word), you think it would be sexier if the maids are unable to speak. You just need something to gag them with...

"Does the que- er, Mummy happen to have any loose pieces of silk?" you ask the maids.

"Yes," Dorcas replies, gesturing to a small cabinet beside the dress closet. "In there. Why do you ask?"

Rather than answering, you waddle over to the cabinet, kneel before it, and open up the top drawer. You manage to find two long, thin, black pieces of silk. You smile and whisper "Perfect."

You close the drawer and waddle back over to the maids. You instruct them "Close your mouths."

They do, and you proceed to pull one of the pieces of silk over each of their mouths. You tie each piece securely at the back of each woman's respective neck. Once you are finished, you tell them "Try to speak now."

They attempt to talk, but all they comes out is muffled garbles. The silk makes a quite effective gag. This certainly is a quaint sight. You are wearing nothing but very thick diapers, yet your intended caretakers are helpless and totally at your mercy. In other words, the Baby has control over his babysitters.

"Alright," you remark, standing over the bound and gagged maids, "Now that you're prepared, let us begin the game. Oh, since I'm the knight, I'll need a sword first, though. Then again, I doubt Mummy would want me to handle an actual sword. So, I'll make do."