"Seems" Pace? How on earth can anyone know what was going on in the aircraft.
And as for the "18 year own golf club greens keeper" saying they were showing off, I despair. I won't use my 5000+ military flying hours to criticise his greens keeping, it would be better he didn't use his mowing expertise to criticise dead pilots.
Given the girls ages, it is highly likely it was their first flight, there is no way that responsible pilots - and that certainly covers both these pilots - would give them control in the known proximety of another aircraft, although it would be perfectly normal to have a gentle "clutch" when S & L. We're not even talking E of C 1 here, but air experience.
And Andrew Brooks? Who he?