Broken Promises and Shattered Homes

Tl;dr: Angst, hurt/comfort, BDSM themed consensual abuse, Voltron AU.
Lance and Keith are brought together as a result of a fatal fire at Shiro and Allura's country home. Lance, mourning his sister and regretting their shaky relations in the months before her death, attempts to hang himself, only to be stopped last minute by an angry young Keith. Keith is pissed that Lance would dare do such a thing, as Keith believes losing his beloved uncle and adoptive home is far worse than anything Lance might be experiencing. Many arguments, fights, and legal proceedings ensue, and Keith is sent to live with Lance along with his two young cousins and adopted siblings, Pidge and Matt. You can bet that more trouble follows as this stitched-together family tries to recover.