Sophie's biological dad has to be a Telepath.
Her enhancing is extra strong with Empaths, because her mom is an Empath, but it's also strong with Telepaths, so it makes sense that her dad is a Telepath.
We know that the abilities that came from her genetics are Teleporter and Enhancer, and that the Forkles tested her Inflictor and Polyglot DNA on themselves, but they didn't test her Telepath genes, even though they needed her to be a Telepath. Those genes can't have come from Oralie; they wouldn't be sure of her ability. So, her Telepath genes have to have come from her dad.