Sir Aggravayne and Sir Modred forced open the door of Queen's room to find her with Sir Launcelot and confronted them.
Sir Launcelot was banished from the kingdom by Sir Gawain and his councelors.
Sir Gawain and Sir Launcelot had a strong battle in which Sir Gawain was seriously injured, but he never gave up.
Sir Launcelot established dominance over the city of Benwick which was his fathers before.
Queen Gwenevere escaped to London because Sir Modred tried to force her to marry him.
King Arthur and Sir Modred (his son) had a bloody battle. Sir Modrid was wounded first and then proceeded to kill his father. Sir Modrid was being immoral while Arthur was gone fighting with Sir Modrid.
After many years Sir Launcelot and the queen reunited when the queen was in the verge of death and realized that everything was their fault.