I need a family tree lmao, do they share blood or not? The have the same mother?

I think no because it was mentioned in the previous chapter that cesare is not the pope’s son and in this chapter the pope mentioned that ruby is not her real daughter

nope different mother and father, it just ruby thinks that they are related by his father but they aren’t related at all.

Why did the pope take them? Besides for using them

There's no "besides" lol he literally just adopts them to use them, either to be his pawns or be his dolls to make himself look like a benevolent pope that adopts broken children

Oh lol