I think too though after waking up, with alcohol in her system and being groggy, that at first she only remembered being at the bar with him and the others. She didn’t really recall being at Fearview even after JM reminded her.
Yet still it probably wouldn’t make any sense to her that JO wasn’t home by then, especially not during a blizzard. He is more responsible than that, according to his friends and family who testified, and he had a niece at home to think about and care for. He sounded like too dedicated a caretaker to not make it home so he was up and ready for his niece in case she needed something or something went wrong during the storm. It doesn’t seem likely he would want to sleepover and get snowed in. And if he was going to sleep over he most likely would have still contacted her to inform her since somewhere needed to be there for his niece.
KR also called him 53 times that night and she received no call back in return. Usually if people call that many times others assume it is because there is some sort of emergency and considering she was with his niece that may seemed out of character for him to not contact KR back, even if they were in an argument, in case there was a emergency or medical problem.
Also, wasn’t she supposed to be his ride home but if he didn’t call her to pick him up how did he plan to get back in the snowstorm?
He doesn’t answer when his niece calls and JM doesn’t know where he is either. So the worry builds, where is he, how is he and is he safe?
From testimony from JM and KRob the worse case scenarios go through her head like perhaps he tried to walk home because he was still mad or out of spite (in this scenario drinking could have impaired his decision making too) and possibly got hit by snowplow or car by accident? What if he somehow succumbed to the cold? I think that is why she rushes out there to try to drive and look for him. She does to the bar and checks the streets along the way, maybe she tries to go to Fairview but got lost, since she only been there once and was drunk then too, and then to JM to help her and where she notices the tail light.
Her brain is still probably still affected by the alcohol so maybe she cannot think properly which could worsen her anxiety.