First photoshoot

I have booked Rory, myself, my mum and my nana in for a session at pixfoto in a couple weeks.

This is my first time getting professional photos so i really dont know what to expect.

I want it to be perfect. So what happens if Rory just isnt interested and wont smile or if he just isnt in the mood for photos, will they re-book it for a time when he is happier or will they just take the photos either way?

Im really un-creative and can never make my mind up so will they decide on the right settings/props to use?

Im just so worried that i will get Rory all nice and dressed up get there and he will either not be in a good mood or have spit up on his best clothes. And my nana is coming down from up north for the photos so i only have a couple days to get them done.