I'm going to yell at my sister to get her to shut the fuck up with her moaning and whining after her surgery.
Maybe you should talk your sister. What she does or says may bother you, but trust me, it will be better for both of you.
I've tried talking to her so many times, but she keeps moaning and whining about everything.
You shouldn't yell at your family members, even when they are annoying you, because they don't deserve that kind of treatment. Your sister is likely to be very sore for a week or more after her surgery, and it's understandable that she will be complaining to others about how she feels.
She's fucking annoying. I'm going to yell at her anyway.
I am not sure that you will get very far with yelling at her. She just had surgery and she is in pain. You should try to be a little bit more compassionate.