I don't stand for slander and libel, and that's what you're doing. you don't even realize how tumblr works. people post stuff there to share, like artwork with proper credit, then people reblog it. that's proper normal use of tumblr. you're accusing her of stealing artwork because she reblogged a post made on there with credit to the artist left intact. she didn't repost it, she reblogged it from someone else. if reblogging art on tumblr was art theft then that would make virtually everyone on tumblr art thieves.
don't mind Erzascarlet8, she doesn't understand the difference between copyright infringement and fair use such as parody/homage (she tried to claim I was an art thief for non-copied fanart at one point) and she'd rather spitefully slander and harass people who try to explain copyright laws and what is and isn't copyright infringement to her than actually learn from anything anyone tells her.