I have a problem with an exercice, its for vocabulary practice purposes (family vocabulary) and it formulates questions such as "who is maria and pedro?" and it gives the family tree so you can see how are they related
so my question is the following, how do you write when a boy and a girl are the children of a couple?
you know: man + man = brothers
girl + girl = sisters
so I want to know how you write in russian girl + boy, since when you put it in plural in spanish it gives the plural version of the masculin and feminin form

This post was edited by Nikasaur on Oct 11 2016 12:48pm