Ref:
I don't know if its ever been determined with absoluteness, that the 10th is mother and the 4th father. The 4th is "foundational" meaning, our childhood and usually the mother rules in the childhood. The 10th is the public eye, and usually the father takes the role of main provider (although in this age and times, it can be opposite with the mom working more or earning more)
Beyond that (simply saying I don't disagree with you Waybread, I'm on the fence myself with the 10th & 4th houses, but we know at least for certain, they both signify the 2 parents.
But in turning the chart in this case then, I was looking at Volume as the planet Mars and counting 4 and 10 from the 1st house. Counting 4 houses from the 1st or from Mars (Volume), I see the Sun ruler of Leo as likely the father in this case (Sun being male) and found in the 10th house. It is ruled by Saturn but makes no aspect to the Moon.
What do we take the 7th to suggest? The marriage of her parents, the one being asked about OR the interloper Venus?
4th house is generally where we'd look for the final answer, and in this case ruled by the Moon which as mentioned, in Gemini (duality) two people.
Moon opposed to Venus in the 9th, so yes some turmoil concerning Venus (ruler of the 7th) Now WHO is Venus?
The one planet (in this case a dwarf planet) is Chiron the wounded one sitting right on the Ascendant. Seeing Chiron here is making me sad for the family and for Volume.