But this this article by Paul Sheehan shows that she doesn't do so well when it comes to how to actually deal with the problems:
When relationships become sexless, Arndt's attitude towards infidelity becomes elastic: "If the sex supply breaks down, then fidelity seems a totally unreasonable demand or expectation . . . But it is heresy to suggest such a thing . . . Adultery always spells disaster for a marriage, or so everybody seems to believe."
Arndt, however, doesn't, quoted also in the article on how adulterous relationships can reignite the desire for sex, and how these relationships should be concealed from the spouse.
This is a terribly damaging view of what sex is about, elevating its importance to a level it should never hold, and effectively making it more important than the marriage (and therefore the family) it's intended to serve.