We were still reeling from the news Ariana Grande had been split from her husband after just two years – and then came the shock rumours that she may have already moved on with her Wicked co-star, Ethan Slater.Ariana, 30, has been filming the musical adaption with Ethan, 31, in the UK since the start of the year, and they've been pictured looking cosy together at a cast celebration. Now, a source tells heat that Ariana's husband Dalton Gomez, 27, has been left feeling "blindsided and humiliated".We're told, "Ariana assured Dalton there was mo one else in the picture and, as far as he knew, they were on a break and would work on their issues once she got back to LA.