Okay, humor my tinfoiling, for I am both old and an old-fag and tend to ponder too much.
The part about Cloey's window leap that has not sounded rational to me is that Lainey needed to put her in her room so she could cook dinner.
Lainey? Cooking dinner? The most cooking she does is microwaving things and putting them on paper plates. Moreover, that house is filled with canisters of cold cereal, the bulk of the kids' diet. Any meal she prepares, at most, would take five minutes to prepare. Most people with toddlers will pop them in the high chair or in a playpen for those few minutes rather than take them to their room. No one needs to put a child away for the length of time it takes to heat a veggie burrito or pour soy tard cum over cereal.
We also know, from Lainey's complaints to others as well as reports from Shiloh, Skye and other women unlucky enough to have been sexually involved with Greg, he demands sexual interactions up to eight times a day, including showers. We've all wondered how they carve out the time for that and shield the kids from seeing it, at least when they are conscious. They get put in their rooms, possibly locked in there. I don't think they are depraved enough yet for Lainey to blow Greg on command in front of her kids, though she appears to be DTF if the kids are asleep in the same bed.
I wonder if it wasn't time for suk mi, or worse, followed by a shower. Lainey secured the kids, tended to Greg for however long it took, and Cloey fell during their marital bliss and the sound of the shower and Greg's autism meant they didn't find out until she'd been on the pavement for a while. After the shower, Lainey checks on the kids, can't find one, Greg goes looking and then events unfold, with the camera and Lainey calling 911 and handing the phone to Greg.
The core of this musing of mine is that Lainey simply does not cook. That detail is a lie, an outright lie. And why would they need to create an outright lie? To cover the fact that this disgusting man whose foul habits have been discussed all over the place was demanding sex yet again from his boywifething and his daughter nearly died while they were hosing off for the sixth time that day. As others have said, toddlers get into shit and bad things happen to even well-tended children but I absolutely do not believe Lainey was cooking, nor that such cooking, if performed, required the amount of time needed for Cloey to have been left alone long enough to make it into her brother's room. climb into the window, and fall out. They made up the lie so their gross and overly frequent sex life would not be a part of a police report, and to hopefully cover their negligence.