In 1760, with the security of a Kapellmeister position, Haydn married. His wife was the former Maria Anna Aloysia Apollonia Keller (1729–1800), the sister of Therese (b. 1733), with whom Haydn had previously been in love. Haydn and his wife had a completely unhappy marriage, from which the laws of the time permitted them no escape; and they produced no children. Both took lovers.