True. So maybe ICA used the duct tape for the first time the night of June 16th for her date with TL, all the while knowing that Caylee was dying in the car - ICA and TL spent the next day in bed IIRC. Surely she knew Caylee would be dead.
Maybe on the 16th ICA became enraged and pitched a hissy fit a la: "I didn't want this baby in the first place, now Mom and Dad won't help me by babysitting, screw it, I'm not letting Caylee interfere with this wonderful new relationship I have with Tony, they can all just KMA, I'm ending this all right now, what about ME?, no one thinks about ME!"
ICA may have on occasion bedded Caylee down in the rear seat of her car. Possibly using cough syrup, etc. As Caylee got older maybe this didn't work any longer and things progressed. Makes me sick just thinking this.