In Deep Water (2022) Melinda loses her scarf during a picnic and Vic goes back on the next day to retrieve it. While he was at the creek he gets surprised by Don, who finds the lost scarf.
But what was Don doing there?
We know that he was talking to Melinda about her suspicions and he had hired a private investigator, but by this point in the movie Vic had already uncovered the PI (and it doesn't seem anyone followed him to the woods).
It's also not implied that Melinda told Don about the picnic or the scarf, although that's possible (but why would she do that?).
Did Don know Vic's whereabouts that day or was he there by coinicidence?