Complex sentence: She engages him sexually, but it is cold and mechanical, for she refuses to spend any time with Nately without pay.Captain Black would frequently sleep with her to aggravate Nately.
Split into simpler sentences: She engages him sexually, but it is cold and mechanical, for she refuses to spend any time with Nately without pay. Because of her emotional distance from Nately, Captain Black would frequently sleep with her to aggravate Nately.