Is it hormones????????

My half sister (same dad) she came to the UsA from mexico wen she was 14 (6 yrs ago) she was a reallly goood person! My mom ( my real mom) loves her, but my mom would always be an investugator with her , she would be jealous if her uncle tries to talk to her & i defend my sister ! Like wen my mom screams at her i would be like "dont sream at my sister shes just tryinq to help u " & after she grauduated from high school thats wen things whent down hilll , she only had her HS deploma , (she knew a little inglesh , & didnt fet barely credits) & she ended up working at mcdonalds with my aunt(my aunt is managerr ;D ) & my mom wasnt proud cus my mom knew she could do better ! Because she was in college for 2 months & dropped out becuase it wasnt working for her ! Lol & she ment her future husban in mcdonalds . My mom & das hate him because hes disrespectful .(he screamded at my mom & dad -.- ) lol but i wasnt there wen it happened xD , but hes a sweetheart . xD , anywhoo ahe got pregnant around octoberr ? And the baby was born yesturday ( she is a healty beautiful baby girl :) & my dad gave het lecture to move back in with us, because seriously he wouldnt be a good father >:| . but she refused & wen the baby was born she called her whole family.. Wen she first at tge hispital , like she eventuallt called my dad & we went there at the lasr minutte. Like i wasnt even there wen she was pusshinq & all that $hit , like i think shes beinq ungrateful because we r the onlybpersons who truely cares bou her like her uncle doesnt give a $hit , i think its hormones like i know she loves me and my sister and dad (idk about my mom becuz its not her real mom xD) anywhoo is it hormones cus shes beinq bitc-y lateley >:|