help

ok i want breasts ik I'm only 14 but all my friends have breasts & i tried cutting holes in my sports bra & filling them with stuffing but my mom found out I'm short but my mom says i might b busty 2 make up 4 my short height i wiz wondering if there wuz a safe way 2 make them bigger MY 11 YR OLD SISTER HAS BIGGER BREASTS THAN ME I'm also a lil bit chubby I H8 MY BODY