could i get some clarification on kates bimboing thing and how to get her in your room
Once you've gotten to the point where Val can bimbofy up to one other character at a time at your discretion as described before, then each character that can be bimbo'd at your discretion will show up whereever it is they show up, so long as there is no one currently in bimbo state due to Val. Kate shows up in the streets just outside of your house (the screen where you can transition to either your living room, the item store, the bounty store ran by Eric and Erin, the screen of the area just outside of the school, or the screen of the area just outside of the Enchantment shop). Once you click on her portrait there, and agree to let Val bimbo her, she should show up in your bedroom right away, and only go back to her spot on the street if you unbimbo her.
Sarah needs to have been dollified (meaning you've turned her into a doll through the Stone Skin spell (evidenced by the presence of doll joints on her arms in her portrait)), and must also *not* be a slave. At that point, after getting to the "you can have Val bimbo one person at a time" state of Bimbos Gone Wild, you'll see Sarah's icon in the school hallway, and then after talking to her there, you can find her in your bedroom so long as she remains not your slave, where you can bimbo her (the only case where Doll Sarah's portrait will change at all from personality alterations, as no other personality has an alternate version for Doll Sarah).