On the morning of 13 March 1881, Maria's father-in-law Alexander II of Russia was killed by a bomb on the way back to the Winter Palace from a military parade. In her diary, she described how the wounded, still living Emperor was taken to the palace: "His legs were crushed terribly and ripped open to the knee; a bleeding mass, with half a boot on the right foot, and only the sole of the foot remaining on the left." Alexander II died a few hours later. After her father-in-law's gruesome death, she was worried about her husband's safety. In her diary, she wrote, "Our happiest and serenest times are now over. My peace and calm are gone, for now I will only ever be able to worry about Sasha." Her favorite sister, the Princess of Wales, and brother-in-law Prince of Wales, stayed in Russia for several weeks after the funeral.