Make Jett a little more proactive, and willing to gather a harem with the Note.

Esther considered her options for several minutes. This beautiful artifact was nice and all, but she didn't really want it for herself. Her desire was for a dominating partner that would share control of a large harem of girls with her.

So she once again started to write, "Esther Anwen will give Jett Walker the Sex Note and explain it to him. Upon receiving it, he will desire a harem of **** girls from across dimensions that Esther can make copies of for him to take. While he will still be his usual lazy self otherwise, he will end up being quite proactive when it comes to getting girls for himself and Esther, who he will make his head **** girl. He will of course leave most of the **** girls' personalities intact, other than using the Note to wipe the artificial memories that come with Esther's ability to clone them, and making them his devoted sex slaves in some shape or form, as well as obeying Esther second to him."

She smiled, having left Jett's personality intact, even with a few tweaks to make him willing to use the Note to satisfy their carnal desires.

She walked over to Jett, and handed him the Sex Note, and said, "Take a look at this. It's for real by the way..."

Jett looked at it, and as he read the rules, his personality shifted just a little bit. "Well now... This is interesting," he said, smiling.

They quickly headed home to pack some supplies for a trip to another dimension.

(Vote in the comments where they go first! Note: universes I have no interest in or familiarity with will not be done by me, unfortunately, but I will let you know if your vote isn't something I feel up to doing so you can change it.)