[Sorry, Yuuri. You're going to have to dealing with a lot of puns around Mabel. Although, based on the look of his face, she wasn't too sure if she should continue doing that. He does realize that she was just joking, right?]
Then don't worry, your secret is safe with me! I'll just lock my mouth and throw away the key! See?
[Just like that, she quickly zipped up her mouth and threw away the 'key' in a random direction! As she tried to open it with her hands, she just couldn't! Her mouth remained shut while she struggled to get her mouth open!
Although, if Yuuri listened carefully, he might be able to hear a "And I keep my promises too!"]
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Then don't worry, your secret is safe with me! I'll just lock my mouth and throw away the key! See?
[Just like that, she quickly zipped up her mouth and threw away the 'key' in a random direction! As she tried to open it with her hands, she just couldn't! Her mouth remained shut while she struggled to get her mouth open!
Although, if Yuuri listened carefully, he might be able to hear a "And I keep my promises too!"]