American Dad: Big Baby Steve (Private with Shadejr8)
 

Steve Smith had been hiding a secret from his parents for a while. He had been hiding the fact that he enjoyed wearing diapers and acting like a baby. This was going to change today, however. He was walking into his house with a case of diapers in his hands. He didnt know who was in the living room waiting for him.

Francine would be sitting on the living room couch waiting for her son
"Hello Steve."

Steve jumped a bit as his cheeks turned red. "H..hi mom uh..didnt see you t..there" he stuttered.

Francine: What's that in your arms?

Steves eyes widened as he began to break out in a sweat. "Uhh...its um...some clothes! Yeah! I went thrift shopping!" He replied.

"Really then you won't mind showing me?"
(If I don't answer its cause I fell asleep.)

"Uh..i um...actually have some homework i..i need to do mommy!" Steve said. He quickly ran to hid bedroom and hid his diapers as best he could.

Francine would follow knocking on his bedroom door

One Steve thought his diapers were well hidden, he let out a sigh of relief. He then let his mom into his room afterwards. "Yes mommy?" He asked.

Francine would walk in and go over to where Steve hid his diapers pulling them out. "Explain these."