Boris Johnson reportedly text mistress Jennifer Arcuri 'B******s, I'm your No1 supporter' after being accused of 'blowing her off'. The US entrepreneur is said to have rebuked the-then Mayor of London for failing to attend an event in the capital that she was involved in. It comes after the 36-year-old admitted having a four year affair with Mr Johnson - beginning in 2012. According to the Sunday Mirror, Ms Arcuri was upset at having received support from then Prime Minister David Cameron and Chancellor George Osborne, but seemingly not from Mr Johnson. In a text from October 2015, seen by the paper, she told Mr Johnson: 'Osborne gives me a building. PM confirms my event... And you?