Andrey , thanks for the quick response!
I see in C’s family tree both ACA (+ACB,ACC) and ABA (+ABB,ABC,ABD) appear as A-C’s children. Which is partially correct, yes, C is married A, hence the relation to ABA should be there not only ACA, still it is quite confusing I think.
I’ll think of a proposal as I’m too not sure how to visualize it.
One idea maybe, if I’m seeing C’s tree, AB(A,B,C) children should be dashed line, while AC(A,B,C)s firm line?