Misha's hearing picked up the jump in Bella's heartbeat long before she actually moved away from him. He cycled through a mixture of panic and then worry, once he realized that he was caught out and had no other option that to do as she said. The wolf pulled himself up onto all fours, before he began to shift. Misha had better control than most Betas he knew, but with the moon on full it took all of his focus to turn back into his human form. Once he did, it was clear just how very bad it was all going to look.
"To be fair, I never said I was Mallory," he said, as he looked up at Bella, his gold eyes phasing into hazel.