Totally agree regarding speculation. It's one thing to take the known facts and try to build on them, it's something else altogether to imagine a scenario that is not anchored by any facts.
For example, we know that:
"Mollie was last seen jogging in Brooklyn, Iowa in the evening hours. There have been
no credible sightings of, or communications with, Mollie since that time." (
https://findingmollie.iowa.gov/)
This means that all communication from Mollie stopped while she was jogging, not at the house-sit, but while she was jogging. Speculation should include the fact that she was last seen, or disappeared, while jogging.