Well done Karina! She and Kazuma are still adorable together - especially singing at the Karaoke machine!
I wonder what causes such difference in how the grandparents are during the stay-over. It seems like it would have to do with personality traits, but does that hold up under scrutiny? I've only done that once, with Leo and Lily - Leo was really attentive to toddler Reed and infant Iris, but Lily, not so much. She had that cleaning bottle out very often though, cleaning everything in sight, whether it needed it or not. (I had Leo and Lily come for a stay over before Rose left on her little vacay - it will be interesting to see whether they are still there when she gets back or if they went home when she left.)
Hiroki and Yuki do look so much alike, but I admit to favoring Hiroki's hairstyle. Looking forward to his adventurous as the next heir.
Oh, and I really appreciated Karina's thought about being married with three kids kissing her husband Kaz at the Romance Festival just two weeks after kissing Sebastian there - makes me feel a little less like Rose is moving too fast with Santiago. 
I'm wondering today if my expectations of Akira/Olivia were too high because they were the Foodie generation.
Gen2 Carlos/Aritz also sat down to eat several times a day, but they were also cooking every time so their eating didn't bother me so much. HAHA
Funny you should mention that Leo was an attentive guest but Lily was not.
In Akira/Olivia's case, Olivia has the Family-Oriented trait. I guess I should get so frustrated; it's interesting that no stayover turns out the same.
Still, Kazuma ended up locking the Baker's Cousin Display and fridge (because the two share storage) so Akira began grilling to fill their insatiable appetites.
When I go back into my game, Karina and Kazuma will be nicer to her parents, let them access Karina's cooked meals again, and continue cleaning up afther them.
Akira was a huge help with both the infants and toddlers. Olivia was also helpful during the toddler stage whenever the kids asked her for help.
I complain about the two of them, but they did make raising three infants/toddlers concurrently much easier.
As for Hiroki & Yuki's hairstyles, it is a fact of life. The heir always gets the best hairstyles. *winks
As for moving fast, I created a calendar in my Mishmash spreadsheet to track births, birthdays, festivals, and other important events.
When I was writing the update, I checked the calendar and noticed that the last Romance Festival two weeks ago was the day of Karina's YA birthday and the day she met her real parents.
I hadn't planned all that to happen in two weeks. Darn Kazuma had his Kiss someone at Romance Festival goal, so Karina had to "return to the scene of the crime." However, she had met "her boys" while she was a teen, so...
