I got a chance, and took it

"I traced her up to BYM airport. She entered the restroom and came out with the same outfit but different hair. 

I will send you a screenshot of both pictures now." Chris said and Ethan received the pictures immediately.

'Diana, what are you up to?' Ethan asked as he stared at her pictures with a scared expression.

"Okay! She boarded the plane going to Sheffield. Give me a few minutes to check her movements after landing." Chris said and put the call on hold, but Ethan's eyes were wide open.

Now he understands what's going on. He knew where Diana went now. Nathan has suspected this and warned him about it.

He had called him a few weeks after Diana arrived in the country and asked if she's not acting crazy, which Ethan assured that she has been doing well.

This is why Nathan assured Aroma that Diana will be fine. He later warned Ethan not to allow her leave the country.