Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: The boyfriend branded a cheat after a photograph went viral of him kissing another girl says he has 'made a massive mistake'. Matty Steven was snapped sharing a kiss with Pippa McKinney in AXM in the city centre - who then tried to find him on Facebook after believing she had 'taken down his number wrong'. But his girlfriend, Emily, was tagged in the Stockport girl's post and soon publicly ended their one-year relationship. Now Matty, 22, of Wythenshawe, has spoken of his upset after the ordeal - just hours after an imposter came out pretending to be him and claimed he and girlfriend Emily were on a break.Pippa McKinney, 22, tried to find Matty on Facebook with a statusIt now has 21,000 likes; some said she was kissing and tellingMatty has broken his silence saying he's made a 'huge mistake' 
 Question:A friend of Emily's had tagged her in the status, and after _ spotted Emily's cover photo with the mystery man (which has since been deleted), Pippa realised she must be his girlfriend.

Pippa McKinney