Trigger/Content Warnings for Desperate Omega:

• This is omegaverse, so there is estrus, knotting, and marking.
  
• somnophilia (He's asleep, she's awake. It is fully consensual and his idea.)
  
• spanking
  
• threatened and attempted SA by the bad guys
  
• brief female on male SA
  
• public mating ritual with an audience
  
• some violence and gore
  

If you've read the other Quarantine Omega books, this story is pretty much on par with the rest of the series in terms of darkness.