An; Just an idea ;)
Summary; after Breaking Dawn
Life is going well for the Cullen's, before Tanya showed up. One day Bella comes back from hunting to find Tanya doing things she shouldn't be with a married man. Especially her man. But to Bella it looks like Edward was joining in as well, she's convinced he's cheating. Her and Rosalie go to a club and Edward follows. What happens in the club? And are things really as they seem?
BPOV:
I had been at my last nerve with Tanya; everything had to be about her. So I decided to go hunting, it would take my mind of things for a while. Ever since she had shown up me and Edward didn't get any time to ourselves she always found a way to separate us. I was running back to the house now, I didn't like Tanya but I would rather stay with Edward and her rather than to leave Edward for any period of time.
Renesmee was gone on her honeymoon with Jake and I really didn't want to know the details or anything. Just like when she found it uncomfortable when Edward and me were in the bedroom.
I came to a stop as I heard moaning from the house. It wasn't Carlisle, Esme, Rose, Emmet, Jasper or Alice. I would recognize that anywhere, it was Edward...
I ran full speed towards our room, and as if trying to prove myself wrong flung the door open in time to hear Edward moan Tanya's name. Not mine. And to see him in a very interesting position with her, I gasped out loud and both of them turned to look at me Tanya was smirking, Edward was looking at me as if begging me to forgive him. Not going to happen.
I quickly glanced over them before saying with a calm voice that scared even me
"Sorry for interrupting, I will leave you to carry on now" and fled into Rosalie's room. Rose and me got along really well now, sometimes better than Alice and myself.
"BELLA!" Edward's voice echoed throughout the house, I rolled my eyes I didn't want excuses, I wanted him to admit to me what I had just seen, then get the hell out of here.
I turned to see Rose staring at me her mouth open a centimetre or two.
"Rose, were going clubbing!" She continued to stare at me I resisted the urge to snap a 'what?' at her but I know I would be in shock if my best friend had seen her husband cheating on her, acting calmly and then announcing there going clubbing. I giggled slightly which caused Rose to stop staring and say
"alrighty" and for me to do an Alice and squeal loudly. I had the perfect 'revenge' plan for getting back at Edward...
