most overpowered superpowers

Sandy Brooke, deeply understood sacrifice and love. Her dying grandmother made sure of that. Sandy agreed to be a pretend fiancée to Adam Stark's mentally challenged brother, who was scarred by the death of his fiancée because Sandy looked remarkably like her, when Adam Stark, her billionaire boss, asked her. Initially; she turned it down, but when her grandma's health became life-threatening and she realized her boss was the only person who could assist with the medical expenses, she decided to accept the offer.. Adam was ready to do anything for his challenged brother, even if it meant sacrificing the passionate desires he felt for Sandy. Will they be able to stay away from each other? will their love and blazing desires outshine their sacrifice for the one they both care about?