I'm able to give Veronica a chore on Monday (like I said, skip the Pizzeria notes in the guide, so Sunday morning in the guide for 10am is not there). You said you want the achievements and pictures for normal clothes for chores before you give her the maid outfit? Well, you already gave her the maid outfit, so you can't get those 100% now unfortunately. If you want them, then you're going to have to restart the game. If not, from your save, keep giving her chores, check on her at 12 noon, take her to your room and spank her 12 times, each cheek 6 times, to move on.
EDIT to add: Also, if you're looking to 100% the game, I do not recommend using cheats for other than your sleep, hungry, etc stats and some money here and there. Once you get to the end and have everything, you can increase the NPC stats to finish any achievements that might be bugged.