Damn it, Marshall Lee! (gumlee)

Warning: Smut. Lots of smut.
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   It was midnight and Prince Gumball was sound asleep. Marshall Lee the Vampire King, however, was standing at the end of Gumball's bed. He stared down at his boyfriend of 5 months and chuckled at what he was about to do. He licked his lips and stripped himself of all his clothing. Then turned himself invisible.
   Marshall grabbed the blanket that was on Gumball and pulled it off of the pink skinned boy. He crawled on the bed and towards Gumball, until he was looming over him. He slowly removed Gumball's pants and started slowly rubbing his penis through his boxers. The sleeping boy stirred a little and let out a small moan. Marshall smiled in satisfaction. The invisible vampire chuckled again and lifted Gumball's shirt, kissing his stomach. More small moans. 
   Marshall decided to get to the real fun. He swiftly flipped Gumball over, propping his lower half up on his knees. Gumball woke up, fully aware of what was happening. He was not aware, however, that Marshall was invisible and filming everything on a camera he set on Gumball's nightstand. Marshall whispered in Gumball's ear, "let's get started now, shall we?" Marshall's breathe down Gumball's ear made him shiver. "Please, Marshall...take me," Gumball practically begged. 
   Marshall Lee took off Gumball's shirt and boxers and began rubbing him again. Gumball jumped slightly and moaned.
"M-Marshall..."
The vampire wet one of his fingers in his mouth and traced the prince's opening. He pushed his finger in.
"Oh...Marshall!"
Marshall added another finger and then another, earning several moans, each one louder than the next. Gumball was panting at this point.
"Please, Marshall...e-enter me!"
"Anything you say, my prince."
Marshall pushed the tip of his throbbing erection into Gumball, making him scream his name. Marshall pushed harder and kept rubbing his partners hard member. He started to thrust faster and started feeling precum dribbling down Gumball's penis. He moaned and screamed Marshall's name, neither of them caring who heard.
"Marshall, I-I'm...gonna..." 
"I know, I am too."
Marshall went as hard and as fast as he could go and came inside of Gumball. At the same time, Gumball released into Marshall's hand with a final scream. Marshall made himself visible again fell down on top of Gumball, panting. Gumball turned under Marshall, facing him.
"That was great, Marshall."
"I know. You have some pretty cute moans." 
Gumball blushed and Marshall stuck his tongue out at him. Marshall got up and dressed himself, "It's almost dawn, I need to go." He kissed Gumball, who was too tired to protest, on the forehead. 
"I love you, Marshall Lee."
"I love you too, Gumball." 
He left, flying off the balcony, camera in hand.

   The next day, Gumball got a video from Marshall through e-mail, saying it was a video he made with the special camera Gumball designed for him that could see vampires. Gumball clicked play and was shocked by what he saw. It was a video of last night but with Marshall completely gone. It dawned on the prince within seconds that Marshall must have turned invisible. He closed out it, red faced with anger and embarrassment, and walked out onto his balcony. He shouted, unable to hold back his anger, "Damn it, Marshall Lee!"