WHY DO THEY(SHE) CARE?

MY HUSBANDS CUZIN HAS BEING TRYING TO MAKE MY LIFE A LIVING HELL. SHE THINKS THAT SHE IS COOL CUZ SHE HAS FRIENDS THAT ARE WITH HER EVERYWHERE AND THINKS THAT SHE IS POPULAR. MY SENIOR YEAR SHE SPREAD A RUMOR SAYING THAT I CHEATED ON MY BF(HIM) AND HAD SEX WITH ANOTHER DUDE IN FRONT OF THE BABY.HE KNOWS I DIDNT. WHO SAYS THAT.NOW SHE SAYS IM LAZY AND CANT DO ****. I THINK THAT SHE IS JEALOUS CUZ THE GUY SHE IS WITH IS ALWAYS WTH ANOTHER GIRL AND ALWAYS CHEATS. AND I GUESS I HEARD THAT SHE HAS HAD 4 ABORTIONS BECAUSE THEY WERNT HER BF'S. SHE HAS THREATENED ME AND IO HAVE REPORTED HER. SHE HAS DONE ABOUT EVERYTHING AND IS STALKIN MY LIFE. WEMOVED JUST SO SHE CAN LEAVE US ALONE. MY HUSBAND IS COMPLETLY IN LOVE WITH ME BUT SHE DSNT GET THAT...WHY DOES SHE CARE WHAT WE DO TOGETHER?