He could probably go on for a while about the usual weekend adventures that happened with his little sister around. Then lately he had been teaching her the fine art of pranking their oldest brother with just little annoying things. It would probably all come back to bite him when she was doing it to him, but hopefully even then he would have something up his sleeve. "She's great. Especially when she doesn't cry so much." Though his parents probably figured it was also natural birth control to have a little one around when he was old enough to remember when all she did was cry and eat and poop. Basically the last thing he needed at his age.
"Well she does pay me. Kind of part of my allowance now so at least I don't have to worry about taxes." He saved some of it though, unsure what he was even really saving for other than "the future". Even new snorkeling gear was being pushed off for fear that he'd suddenly have his feet grow by two sizes. He took a seat next to her though and just listened. Julius had to keep from groaning a little. The last thing that any boy wanted to be related in a group that was her brothers and Carter who was "like a brother". It was kind of giving him a picture of where he stood in the grand scheme of the universe. Or at least Julius' general misconceptions about where he stood in the Grace-centric universe. At least he wasn't moving away.
"So you want to practice kissing? Though I'm not sure I really have the background to really help it look good, but we can try?" And possibly again if she felt like it. She might be seeing him as a bit of a brother, but it was hard to just deny her help. Especially when it was something he had wanted to do.