I (m16) was sitting in my room with my girlfriend (16) when my little sister (4) came in to get her ipad and it was on the floor and she bent to pick it and my girlfriend noticed she had some red stains on her pants. I asked her what are the red stains from and she turned around and made a face like this 😳. I was making her tell us what is it and she said how she's not sure if I'm allowed to know about it but I can't tell mommy. It just sounded so wrong and then she also said how dad did something but she can't tell me and I can't tell mom.

I was so sure he was doing something to her that I just went straight and hit him. A lot happened and turned out that he broke a jar of beet juice in the pantry and joked with her telling her to not say anything to mom. I ckecked the pantry and there really were some remains of red stains on the floor and there's a broken glass in the trash.

I feel stupid but I never liked the guy and that was the first thing I assumed and I was so mad in the moment that I didn't think of anything else.