when a significator passes one of the nodes, according to Mona Riegger, a German Astrologer, something will happen soon, that the question that was asked will get unimportant, because everything is about to change for the querent.
Mona Riegger writes about the passing of the Nodes of the moon: Everything will turn out different than expected!
The situation will change that the question will have no importance any more.
therefore, when a significator passes one of the Nodes, it is as well a limitation of interpretation of the horary for the astrologer.
the chart of the question with Saturn in 7 and the passing of the Node by the significator of the querent, if he betrays her, says: an answer cannot be given.
in the second chart Moon will conjunct Pluto in the 8th house, that is emotional turmoil, the significator moon will be in an emotional death-like situation and will renew himself after lots of pain.