Two teenage girls have just turned up to my neighbours house. The parents are out at work as essential workers and they have three kids: two teenagers and one in primary school. They were knocking on for a while, as well as trying the door to try and loosen the key (our windows are open so could hear them talk). They must have been there for about 15 minutes before one of the daughters opened the door and let them in.
I have the mum on FB, would I be unreasonable to message her to let her know?