To access the whole series of posts just click on the tag crash at the bottom.
Vaughan's presence in their lives has invigorated Ballard's sex life with his wife Catherine. It has also triggered multi-layered psychological games.
In this short (four-page) chapter we see it in practice. Catherine takes Ballard's almost self-righteous obsession with Vaughan and first shows him that he is possessive over it. Then he realises she gets off on the fantasy herself ... but her pushing of him, and near goading of him to extrapolate on the admiration into homosexual attraction strikes a chord. He has thought about this and Catherine reaches another level of fantasy visualizing them.
Ballard and Catherine are now willingly immersed. What we are waiting to see in the narrative is if this will lead them back into the physical and dangerous part of Vaughan's world. That is assuming that Ballard has ever been away from it since his first accident.