During the following night, Jeff wake up and, seeing the chronivac, decide to see if he can't use it to make his current situation a bit more easy on him.
Taking care to get out of bed without waking up Jenny, he look at the miraculous apparatus and accidentally open the historic. Upon seeing what changes his girlfriend/wife had really made to reality, he became furious and decided to avenge himself.
First, he make it so Jenny wouldn't wake-up until he decide she does, validated, and booted the PC connected to the chronivac.
Once that done, he made it so his mother was a childhood friend of Jenny's father rather than her own mother, and he was the one who used to be human. (His new name being David O'Brian.) Shanon for her part was a born succubus and the daughter of the original Satan, and the one who overthrew him and renounced his teaching, ultimately becoming Queen Lucifer the 2nd, ruler of hell.
For the rest, he mostly let the thing stay the same, at least for now. He also programed thing so as soon as he got back to bed, he would start to be sick. Jenny would immediately call for her mother and Dr. Lorelei. The verdict would be that, to save Jeff, the only way would be to make a royal demon that's both a succubus and an adult become Jeff's second-self and Shanon, or rather Queen Lucifer the 2nd, being the only one corresponding, would immediately accept.
Naturally, Jenny wouldn't and would do everything to prevent it, which would wake up Alice. The angel would want to help her friend, but would end-up being another-self for Jeff, just like Shanon herself.
While having Lucifer the 2nd as one of his other self wouldn't break his love/wedding with Jenny, it would still make him inherit the motherly feelings the queen had for the princess, along with her love/wedding for David O'Brian. And since both relationship are older than what he had for Jenny, they would have priority over it.
Worst, at least for Jenny, is: With all the duties of Lucifer, be it as queen of hell, as David's wife or as Jenny's mother, there is no time left to be Jeff, let alone Alice. No, her lover (among other things) will only have time for his Shanon/Lucifer the 2nd persona.
Jenny will be forced to be all alone, without her lover and without her friend.
And cherry on top, (for Jeff/Lucifer the 2nd/Alice) because she tried to interfere, Jenny would be forced to go trough a ritual that would make her renounce her royal title, taking her wings with it.
Jeff validated the changes and got to bed, causing the previously described chain of events to happen.
-
The next day, Jenny was still crying in her bed. Not because she wasn't a princess anymore, she didn't care about that, but because she was all alone in her bed. She would never share a bed with Jeff anymore, never share anything. And even if she could, he would look at her more like a mother do than how a boyfriend is supposed.
She couldn't even ask her best friend, her only friend really, to come help her with the situation, because she too became one of Jeff's persona, just like her mother. And her mother is someone so busy being the queen she didn't have any time to be anyone else, not even to comfort her daughter.
And worst of all, said mom had taken the chronivac to her office, she was its owner after all. So no way for Jenny to change things back to normal.