Britain's Got Talent host Ant McPartlin's little sister, Sarha Nigrelli, surprised fans when the couple split back in 2018. She retweeted several messages criticising her famous brother's ex-wife, Lisa Armstrong.READ: Ant McPartlin’s ex-wife Lisa Armstrong confirms new romanceOne message, which Sarha shared on her own Twitter feed from a different account, calling Lisa a "bitter lady" and urged everyone to give "the poor lad a break".