Hello and welcome. As for introducing the pair - don't! You may have a male and a female. In any case it is better to only keep sibling pairs, and not introduce dwarf hamsters to live together.
It's important not to disturb the cage now until the pups are coming out of the nest on their own with their eyes open (if they aren't yet). Or the Mother could cull them. Just put plenty of food and bedding out.
I think it's about four weeks you need to separate male from female robos but it is not easy sexing them. Easiest way is in a glass jar, one at a time. Scoop one up and hold the jar up and look underneath. Even then it is not always clear if they are male or female (but check photos of male and female robo underparts). When it comes to separating them at four weeks, definite females can stay in with the Mother. Definite males can stay together in a separate cage. Any "not certain" sex will need to be kept separate.
Robos breed like wildfire and a boy could mate with the Mother or a sibling.
This site has a lot of info about robos (breeding, sexing etc).
Oak Farm Roborovskis