A very out of the ordinary situation has come up where I will be out, my 8 year old will be at Brownies and my eldest (11) will be at home (I'm usually ferrying her). Usually my husband takes our 4 year old to collect the middle one from Brownies, but on the odd occasion our 4 year old has been asleep our neighbour has come to sit in the house while he goes to collect her (we have very good neighbours). If he were to be asleep this week, would it be too absurd to leave him at home with his sister (with her knowing she can knock next door for help)? She hasn't spent any time at home on her own previously. She does love and trust our neighbour so i think she'd be fine about approaching them for help. And we would give our neighbour the heads up about all of this.
Ultimately, do you think that would be acceptable?