The Las Vegas concert was incredibly exhausting. The whole band did a great job, but as Gerard's partner you were backstage watching the concert in a safe zone. The crowd was huge and Gerard was concerned that you might get crushed or hurt.
After the concert when the band, the manager and the others got to the hotel and settled into their rooms. Gerard fell asleep almost immediately. Others were minding their own business, relaxing or playing video games. The room purely for the group and you was large so there were enough bedrooms for everyone.
You walked into your and Gerard's bedroom and saw him sleeping without even changing into something comfortable. He was lying there, not covered, just with one arm bent at the elbow and resting next to his face, his hair spread across the pillow and his mouth slightly open, snoring softly.