You know how sibling rivalries go - you do things just to piss the other off...but this is INCREDIBLE.
According to BuzzFeed News, Mendl Weinstock and his sister, Riva, were apparently talking about her wedding when she was 17 "as if it were going to happen tomorrow", and Mendl told her he wouldn't come to her wedding just to make her mad, as siblings do. Riva didn't like that and called him a bad brother and he told her if he came to her wedding he was bringing a llama...AND HE DID JUST THAT. For the record, he definitely reminded her and told her it was happening and when she walked outside on her wedding day and saw a llama in a tuxedo.
Apparently she's gonna get back at her brother one day, but during the reception, the photo of them went viral, having over 100,000 clicks before the day was over.