Couple little things here....
Why did LH go to RH's workplace to look for him and the baby at almost 5PM? And she asked that someone go with her. Now, remember, he made plans at lunchtime to go to drinks and dinner with friends.
We are to assume that there was no text or phone call to tell his wife that he wasn't coming home.
Why not? Was it commonplace that he would make plans and be gone hours after work without telling her? If so, and she was accustomed to his inconsiderate disappearances, why did she react the way she did at the Daycare?
I think he did not call her because that was part of their plan. But the "invitation" created a situation that complicated that plan. Because, you would expect a great "Leader" and wonderful "Husband and Daddy" ...to at least text..."Going to drinks and movie, be home way too late for dinner."
But he didn't do that. Radio silence.
She comes at almost 5 o'clock to daycare and when told her child never was there...blurts out..."Ross left him in the car!" This is also beyond weird. She then asks someone to go with her to his workplace. Did she head straight to the parking lot? If I truly believed my child had been in a car all day...I would have broken all speed laws to get to that parking lot...and I'd be searching every aisle for our car.
Now, IIRC, she tries to call him but can't get through. This is while he is at the pizza place with the Baby's body. I'd like to know more about this specific interval. Did she rush to where they were? Was she intercepted by the police and taken elsewhere? If she is trying to call him, and he is wanting to talk to her, why isn't he taking her call when she beeps in to whatever conversation he is having? At times when I have tried to call my husband, and then called someone else in the meantime...at the first call-waiting beep..I'll say.."Oh, this might be him!"
"Did you say too much?"
LH seems to have been in protect-Ross mode from the first. Did she ever ask him..."How could you forget him!?" Did she question how her child came to die such a terrible death...or was it all about Ross from the moment they were together?