I'm curious if anyone knows when the comments about not hearing Andrea knocking vs being scared to let her in happened chronologically?
Was there enough time between "didn't hear her" and "I was scared" for the information about her phone being at her mom's home at 6:30am to come out? That makes it seem like someone realized no one would buy the story that Andrea wanting in at 6 in the morning could have gone unnoticed and then decided to turn Andrea into the aggressor rather than victim. Seems fishy.
If Andrea went to Erin's pretty heated, left still upset, tried to get a ride for an hour and that didn't pan out, I would think the only logical emotions one would feel in that situation would be desperation/defeat or really angry. I really don't feel like the former would end up with her at her mom's house. I think the latter would, which makes me think she went there possibly to confront them. I'm not sure I believe someone in that situation would walk away without someone answering the door, even if it meant banging on a door for an hour. I could see someone listening to that from inside initially saying "just ignore her, she'll quit" for a while, but eventually everyone has a breaking point.