Is it normal for my 15 year old niece to be a bitch

All 15-year-old folks are insufferable cunts. Tis the law of nature.

Because she's a teenager, it's normal. Some of them them are angry balls of hormones trying to find their place. She might stop being a douchebag when she's older.

I agree with the comments about her needing sex to reduce her being a bitch. I was a bitch when I was 14, then had sex, and when I was 15... well, not so bitchy after that.

Teen girls go through a stage of hateful full-on bitch, and sex does wonders putting a bitch in a good mood. It is true with adults too.

If you're a female, either find a a guy to fuck her (if she's straight), and if she's bi or gay, then go to her with good aunt lesbian action. If you're male, then find a girl to lez with her (if your niece is gay), or just fuck your niece with good uncle love, and let her know you care enough about her to give her the best.

Anyway, yeah, being bitchy at that age is normal.

15? Yes. Teenager and all that. Although, not all teens are aresholes, I can attest to that. But it's a rarity. Thank you very much.

Bitchiness is due to lack of sex.

If it's a girl yes. But if a boy fuck no.

She is 15 and probably has many adolescent issues from school, friends, and life going on. Don't hold it against her.

Ignore some of these disgusting attention seeking responses from gross pedophiles! I'm 40 years old now but I do remember that I was in a bad mood from the age of 13 years until I was about 18 years old. It's normal for teenage girls to be moody, sulky and selfish.Be sensitive to her but don't allow her to get too out of control with her bitchiness, otherwise unchallenged her bitchiness might become her personality

Just hope your daughter would not turn like her

No, if she's a female dog you should get your cousin done for beastiality.