SISTER.hE IS 26 AND SHE 17.THE OTHER DAY I WAS WALKING TOWARD HIS HOUSE AND I SEEN HIM AND HER IN HIS MOMS ROOM AND HE WAS ABOVE HER AND SHE WAS SITTING IN A FUTON.I STARTED CALLING THEM AND WHEN HE SEEN ME HE RAN THROUG THE BACK WHERE THE LAUNDRY ROOM IS AND WENT THROUGH THE BACKYARD.I ENTERED AND HIS SISTER CAME TOWARD ME FROM THE ROOM.SHE ACTED IKE SHE DID NOT KNOW HER BROTHER WAS.THEN HE CAME THE BACKYARD AND HE WAS ALL SWEATY.I HAVE A FUNNY FEELING EVERYTIME IM AROUND THEM LIKE THEY ARE DOING THING'S OR IS IT ALL IN MY MIND?WHAT DO YOU THINK I SHOULD DO..PLEASE NO KID ANSWERS JUST ADULTS WITH SERIOUS ANSWERS.