Hey stepdaddy, I have a confession to make! I kinda looked into your phone and found all those sites you've been using to meet other women, and I don't think mommy would be happy about that, so I had this amazing idea that will help you not to cheat! I found you a pink cock cage so we can lock up your dick to keep you faithful, and if you don't agree I'm gonna have to tell mom everything! So you better put on this cock cage, and I promise to let your cock out whenever I feel like you're allowed to fuck mom. I just don't want you going out of the house without that cock being controlled! And if you think I'm bluffing, I've got all the proof to show to mom that you've been a cheating bastard! So are you prepared to take slight measures to stop you from cheating, controlled by no other than me! And if you agree, I promise mommy will never know!