Lonesome Dove, Volume 2: Comanche Moon by Larry McMurtry

THERESE WANZ was much put out when she emerged from the white tent and discovered that Captain Call and Captain McCrae had left Lonesome Dove in the night. She had been up early, gathering eggs in her basket from hens' nests in the crumbling house left by Preacher Windthorst. She liked the two young captains; having them there was a fine change from the company of her husband, Xavier, a man disposed to look on the dark side of life, a man who had little natural cheer in him or even a satisfactory amount of the natural appetites all men should have. Frequently, due to his gloom, Therese had to sit on Xavier in order to secure her conjugal pleasures. Xavier was convinced they would starve to death in the Western wilderness they had come to, but Therese knew better. In only one day, with the rangers there, they had made more money than they would have made in France in a month, doling out liquor in their village for a few francs a day.

All day the rangers had drunk liquor and paid them cash money, a fact not lost on Xavier, who threw off his gloom long enough to accord Therese a healthy dose of conjugal pleasure without her having to go to the trouble of sitting on him.