Alyssa is the Sentinel of the Brotherhood of Steel. After taking down the Institute and killing her son, she managed to make peace between the Minuet Men, the Railroad, and The Brotherhood of Steel. She has loving relationships with her companions, but when Elder Maxson, leader of the Brotherhood, brings her to the Citadel in Washington, he takes what was supposed to be nothing more then a friendship way to far. After both getting drunk and sleeping with each other, Alyssa abandoned Maxson and heads back to the Boston Commonwealth, where she finds out she's pregnant once more, with Elder Maxsons child; Slow Updates
At first she thought maybe it was a dream. Maybe the whole thing was an early afternoon nap induced nightmare. Until she opens her eyes and is greeted with her husbands corpse, missing son, and the total annihilation of the world she had once been a part of.
When her survival instincts prove too strong to let her just fade away, the Vault 111 Sole Survivor begins a personal quest to get revenge on the institution that took everything away - including the woman she once was.