This site features an excellent timeline of the relationship of Mozart and his father, Leopold Mozart. His affair with Constanze Weber created a drift between him and his father.
Constanze Weber who was the heroine in “The Abduction from the Seraglio”, which sported a heroine, incidentally called Constanze. His father didn’t approval of the relationship and Amadeus complained of his father’s meddling. Remember, during his lifetime Mozart was a superstar. Constanze Weber eventually married Mozart. The couple had six children but only two survived until adulthood.
The courtship continued, not entirely smoothly. Surviving correspondence indicates that Mozart and Constanze briefly broke up in April 1782, over an episode involving jealousy (Constanze had permitted another young man to measure her calves in a parlor game. The measurement of a woman’s leg’s calf was considered a beauty standard in the 1700’s much like the tiny waist..). Mozart also faced a very difficult task getting permission for the marriage from his father, Leopold. Leopold controlled the proceeding from his performances.
He’s perhaps best known for The Requiem in D minor, K. 626, it is perhaps the most famous requiem mass. Mozart composed part of the Requiem in Vienna in late 1791. It’s commonly called “Requiem K“