[support] refer/retrieve/save grandparent in child node without parent's node load

Couldn't think of an easier subject line :-) I have three node types A -> B -> C A <- B <- C where A refers B and B refers C (and there's CNR for backwards). Now when displaying content from C, i would want to display A's titles (atleast). Is there a way where I can refer A as well in C because of the reference to B? This so that while displaying C, I don't have to load B's entire content and then retrieve A. C can have unlimited number of references to B. So loading B within C is not such a good idea. I hope you are not at c when reading this :-) All help really appreciated. Regards - Ben