I kinda get that but the why was Monica and her mum stats changed so dramatically as it is unlikely they would change that much. I noticed with my play through at least her love was very low. I am not saying it should be like level 5 but it should have had a big buff. I think it is 0 on me but it should maybe be like a 2 but at least a 1 surely
It does make some sense to me, you have to remember that Monica was traumatized by professor Burberry and Monica then went on to traumatize her mom, there is even a statement where the narrator says "You'll have to thank Professor Barberry in the future, for doing the hard part before gifting you a slave with powers."
Monica was kidnapped Sunday night and let's assume came back Wednesday night, that three full days of torture, Monica then has two full days to torture her mom. The person where its possible to spend the most time with overall is Mrs Maywood and without torture you can make some big level improvements to her (like plus two levels in each category).
Also you do get +3 (points not levels) to all if you use it in conjunction with sleep. And if you think about it, we don't know much about lights yes, this was an unstable light, I assumed early on that unstable lights would cost 100 energy or 80 reduced as they give out twice as much exp as dancing lights but it seems the cost is the same. Maybe unstable lights don't change those three core stats unless the person is ready to accept it i.e. raising wards slave levels will change her core stats more significantly if enslave her later. But that is just my guess.