Am I Wrong?

MY SISTER GIRLFRIEND MOTHER IS IN THE HOSPITAL. I CALLED MY MOM TO TELL HER I LOVED HER AND I MISS HER.MY SISTER GOT MAD AND TOLD ME THAT I SHOULDA NEVA DONE THAT BECAUSE HER GIRLFRIEND DOESN'T HAVE A REALONSHIP WITH HER MOM. SHOULD I BE MAD BECAUSE I TOLD MY LOVE I LOVE HER AND I MISS HER. I LIVE IN CT AND NEVER GET TO SEE HER CAUSE SHE LIVE IN NY. HER MOM LIVES OUT HERE AND SHE DON'T TALK TO HER. WAS THAT A BAD THING TO DO?