I surprisingly managed to fuck Kitty right in the pussy on day 5 in the evening, while in the shower no less. I wrote a little guide on how to fuck Kitty on day 5 in an earlier post, but that was in her bedroom and at night. The girls are much more reluctant to do sex stuff in public. Also, she wanted the D in her V with her lust only at 97, instead of 98 or 99 which I thought was a prerequisite. It also side-steps the RNG savescumming of trying to catch her in the shower with just her pink over shirt taken off.
The only thing I did differently compared to my "guide" is that when I was doing threesome actions with Rouge in the morning and afternoon, I would first ask Rouge to make out with Kitty before ask them to dance. Asking to dance forces both girls into "threesome" mode where both girls' stat displays are visible. From there you can stop and choose another action, like, "Switch to Kitty" which you could not do otherwise.
By switching to Kitty you can milk some stats by asking her to do sex stuff, and then saying "Ok, no problem" when she says she's not comfortable with that yet. After that however you should switch back to Rogue and ask to make out with
her.
Normally Kitty would get embarrassed and boot you both out of her room, but as far as I can tell by asking Rogue to to make out with Kitty as your very first action, as I previously wrote, Kitty will be comfortable watching you two make out and will start masturbating. From there you can start jakin' it and nut on Rogues face and have Kitty clean up. At this point you can make out with Kitty if you ask her to and feel up her thighs for some more stat boosts. I
did abuse the 'clean-up partner' option, but not that much, maybe once or twice.
By the evening, you can find Kitty in the shower masturbating and then enter quietly, start jackin', slap ass, and she should be willing to have some sex. Just be sure to get her lust as close to 99 without going over.
I hope that all makes sense, and I know that this information may not be that important to some players. This is for folks like me who think fucking the girls on the first day you meet them is super hot.
Fucking girls on the first day you meet them can be done with all the girls, but Kitty was by far the hardest. Now that I stumbled across this method, Kitty may be slightly easier than Rogue since you don't have to savescum at all to manipulate the RNG instead of twice.