Thing is, way before this footage came into play, Jo said only one person came into the shop that day. One. So, we DO know it was Elaine who sent the fake emails. So, with what we know and what we DON'T know are two different things. Elaine sent them, that is a given now with the footage. However, I think that the dad had her do it. I could be wrong. But, the dad seems like that type of asshole. I'm also not a fan of Elaine, so, I'm not defending her. She's admitted that there are things that she's done and the MC wouldn't understand. That it could destroy any type of relationship the have or could have.
Again, these are my opinions. I could be very wrong. None of us know. Only Cheeky actually knows.