Seeing that Jeff has no intention to explain the 'Jeff-Jeff' nickname, Aiden spoke. "When mom wants us to do something, she uses a special nickname. Based on how she calls us, we have a good guess of her mood and intentions. When mom uses Jeff-Jeff, it means that he needs to do something he will probably not like, and he does not have an option to refuse."
Sarah felt like laughing, but seeing how Jeff is in a bad mood, she suppressed it.
She looked at Aiden. "You are talking not only about Jeff, right? What is your no-option-to-refuse nickname?" Her lips curved up into a mischievous smile.
Aiden felt that Sarah is ready to tease him, and didn't respond, pretending that he didn't hear her question.
"Den-Den...", Jeff spoke while smirking at Aiden. "Mom calls him Den-Den." Since Aiden ratted out on him, he will not lose the opportunity to get back at him.