 They had one son, Antoine (1837-1862) who died while he was in medical school.Lachmann left Villoing shortly after her son's birth, and after traveling to Berlin, Vienna, and Istanbul, she ended up in Paris, near the Église Saint-Paul-Saint-Louis and assuming the name Thérèse.Around 1840 she became the mistress of Henri Herz (1803-1888), a pianist, composer, and piano manufacturer, whom she met at Bad Ems, a fashionable spa town in Germany.