Rose Johnson being the prime minister, James Johnson's illegitimate daughter did not come as a total surprise to Wesley. After all, he had suspected it, which was why he made his men investigate the matter. But then, the current Rose, being totally different from the former Rose made it seem like there was an impersonation going on.
But then, the question is, if the illegitimate daughter of the prime minister had been impersonated, where then is the real Rose?
Who is the current fake Rose and what is the reason for the impersonation?
Why does Andrew think she's suspicious? Is it because of Sarah or are there really some connections between all these with Sarah?
He found the who scenario strange and even though the whole thing had nothing to do with him, it did with Andrew and therefore, he would try to find out every down thing.