This means that she kept asking him to sleep with her. The full meaning of this statement can be made explicit. Alternate translation: "She kept on asking Joseph to sleep with her" (See: [[rc://en/ta/man/translate/figs-explicit]])
This is a euphemism. Alternate translation: "to have sexual relations with her ... Have sexual relations with me" (See: [[rc://en/ta/man/translate/figs-euphemism]])