Ryu let the thought sit for a moment.
According to Guiot, his father had died. His mother was a mortal without cultivation, yet she had lived for hundreds of years. And his sister, after leaving a state of malnourishment, became a talent great enough to replace the Inheritor Disciple of the Awoken Moon Sect. On top of that, according to Ailsa, Guiot himself was born with a Spear Soul Nature, allowing his talent in the spear to even surpass Ryu's own, at least if the abilities of the Mysteries of Heaven and Earth Pupils weren't taken into account.
All of this for a small family with seemingly nothing special about them was a bit much. However, if they were the descendants of Martial Gods, this could make sense.