For context, this is for DD who is having a newborn photo shoot which I am paying for 100% myself.
I want to have only photos of DD at the session and not DSS as he has already had newborn photos, the session is 4-6 hours so will have to battle to keep DSS entertained and the photographer only does sibling photos at special request for an additional cost, which I have not budgeted for.
AIBU to want this, I am paying for everything at the end of the day.