Bassi lost a mother who was active in her life, recalling the popular Girl Scouts troop she led. Her father was a civil engineer.
"My dad was the person I always went to for any kind of life advice," Bassi said. "I just felt like he knew about everything."
Christmas was her parents' favorite holiday. Her mother would blast Christmas music, decorate the house and make meals such as a rack of lamb and filet mignon.
"I don't want to deal with Christmas really at all," Bassi said. "It actually upsets me when we try and repeat the traditions. For me, it's a reminder of how different things are."
Bassi, 36, and her sisters open presents on Christmas Eve and go to the cemetery where her parents are buried, light candles and reminisce about happy memories. On Christmas, Bassi tries to distract herself by going to the movies and getting Chinese food.
Christmas isn't the only trigger. Construction noise can remind her of her father working on the house. The smell of pumpkin bread may remind her of her mother baking.
Sometimes the reminder is pleasant; other times it retriggers the trauma.
A double rainbow that appeared during her parents' funeral brought hope.
"A lot of times we're OK," Bassi said. "But it's always lingering. You always have to keep yourself in check because there might be a smell or a sound or a voice that reminds you of something. You could fall apart in a second, but you do everything you can to keep control."