Short Story Sunday

Alright, so this is going to be a sort of weekly thing and will stop as soon as I run out of my short stories! All these stories are written by me and they're certainly no master-pieces, but I think they're kind of fun and I'd love some feedback, even if it's negative!

Alright, so here's the first one. It's called Blood is thicker

The situation had escalated, a lot. I faced the two sisters as if on trial. One of them was my wife, but that didn’t seem to cloud her judgement. I must say it was my fault, I shouldn’t have tried to sleep with my sister-in-law. In my defence, I only responded to her invitation. She was the handsome one of the sisters, but my wife was the smart one. If I was offered both, I thought to myself, why not?
‘I would never want to sleep with my sisters wife!’ I sighed. Whatever I said, my wife wouldn’t believe it and her sister would deny it. All I could do, was to look apologetic.
‘I am truly sorry. It was one big misunderstanding.’
‘Misunderstanding? You undressed in my bedroom and wanted to sleep with me!’
‘You said you wanted to spend the night together. You are very persuasive, you know.’
The sisters looked at each other. My wife loved me, that was for sure. It would take some alone-time with a shrink and a lot of presents for her to get over it, but in the end, I was sure, she would cope.
‘Honey, look at me. You know I only love you!’
She didn’t respond, didn’t even seem to be bothered by my words. That disturbed me, more then the nod her sister gave her. She disappeared into the kitchen and came back with a knife, wearing plastic gloves. I allowed myself to breathe again. She went to stand behind me, so I couldn’t see her. I was sure she was going to cut the rope they had used to tie me up. When they tied me up I had thought I was the luckiest man in the world. When I found out the chains weren’t meant for pleasure, I had started to worry. Now her sister came up to me and smiled.
‘I never trusted you. I had told my sister not to marry you, if you wouldn’t have been that rich. Now she’ll inherit all and we’ll live happy ever after.’
I felt a sting and something warm spread across my chest. Everything became dizzy. My chains were cut, I reached up to my neck and saw my hands were covered with blood.
‘Why?’ I asked my wife, using my last breath.
‘You are both guilty, but she is my sister. And I’d never shed my own blood!
I saw how she reached for the phone and gave the knife to her sister, who touched it barehanded.
‘Is this the police? My sister killed my husband! You have to help me!’
She hung up and smiled.

So, I hope you liked it! Have a nice Sunday!