My understanding is the last contact was with Stefan was by phone/text, I don't believe she ever went back home after leaving to stay with a friend. Surely, LE can pull her phone records to see who else she was in contact with that weekend. I honestly do not believe her husband was involved in her disappearance. The carwash could be explained by trying to do some "normal" to keep his children from focusing on their mother's absence. My little one loved the car wash at that age. From his FB photos, even older ones, he appears to adore those girls and I cannot see him taking their mother from them. A divorce would be much easier, especially if her recent charges swayed visitation/custody in his favor. He certainly could have disclosed any known drug use to divert attention away from him, rather than trying to conceal it to protect her and her family. If her family did not know the extent of drug use, I would expect a little denial and disbelief. Drugs are powerful and do not discriminate. Sex traffickers need only to hold a person hostage long enough to become addicted. I don't like to go there, but you have to consider every scenario. I pray she is found safe and can get back to being the mama those little girls need.
Correction to earlier post: I was under the impression her grandmother had recently passed, but it looks to have been a couple of years ago.