I have 2 booster seats with backs for my 2, there is no room to fit another booster in the middle at the back, but there is a seat belt (shoulder one not lap belt).
There will be no one in the front passenger seat, but it has an airbag.
So where would you put the visiting DC for 2 20 minute journeys?
in the middle back?
in my oldest child's booster seat ?(and my child in middle back?)
in the front in borrowed booster seat?
This is an unexpected lift I have to do today as a favour - can get a spare booster seat but can't speak to Mum to find out where she would like him to sit.