We're too old for this.

She was on her hands and knees with him squatting over her. She didn't know why she'd even agreed to do it.

'I've always loved your arse.' He said, holding her hips with urgent hands.

He nudged forward and she tensed...which didn't make it easier the last time she agreed to try this.
She then felt his weight on her, and the intense stab of pain.

'AAAAARGHHHSHIT' she cried.
'STOP. GET OFF. IT HURTS!'

'NO' he grunted.
'I'm...almost...there.'
He lunged forward.

'UNNNNNGHH'.

Leaning over her, both hands on blue was how their granddaughter found them.

'TWISTER. YAY! CAN I PLAY?'