Children of different parents - cross married

Hi I would like to draw a situation, when two sons of are getting married two daughters like on the diagram. I have code like this:

parent{
    g{Children1}
    parent {
        g{Son1}
        c{Son2}
        p{GrandFather1}
        p{GrandMother1}
    }           
    parent{
        g{Daugher1}
        c{Daugher2}
        p{GrandFather2}
        p{GrandMother2}
    }
}

 

How to add a second marriage and children?
Is it possible with Latex genealogyTree?

Thanks for help!