My niece just screams

Alea • 21 yrs Old✨7 - 4 - 14 💕💑💏💕
I'm currently pregnant & I'm living with my sister & niece she's two years old . She yells & screams over literally everything . You can't say to her even be careful Bc she'll straight flip .
Now my older sister lets her yell or makes it worst it's like they're constantly fighting . My niece is very mean & rude , she even treats my mother her grandma really bad do to the fact my sister disrespects my mom in front of my niece . I can't personally deal with my niece screaming so I wanted to ask does her yelling near or close to my stomach, will cause any problems or future problems to my baby on the way .? I've been trying sadly to just stay away from my niece as much as I can 💔