I need advice

My son is 6 weeks old. I breastfeed & supplement with formula throughout the day. Well I'm a photographer and started back shooting this weekend. My hours are typically Saturday's and week day afternoons so that leaves me being with my son throughout the day. Well whoever watches him said that when he gets fussy after he is fed, diaper changed.. He will cry and when picked up will try to nurse them. I do not hold him 24/7 and I don't always let him nurse for comfort but I don't know what to do to help whoever is watching him since he pretty much used to mommy.