The heroine's "plan" was so incredibly far-fetched, not to mention against all the societal rules of the times, that it was obvious it would backfire, which is a bit contradictory since she was presented as being intelligent. 
 Some rules that were broken, making the story historically inaccurate, were: 
 *SPOILERS* 
 -Heroine decides to move into a bachelor's home, who happens to have 4 brothers (3 of them men), just to care for the aunt. I mean, as if people from Victorian times would have deemed this as acceptable simply because 2 old ladies were there... I guess they never heard of young people sneaking around at night? 
 -The heroine and hero were permitted to be alone so often. 
 -Everyone observed how the hero and heroine openly fought... weren't they supposed to be all polite and ladylike and gentlemanly during that time? Their respective families wouldn't have intervened? 
 -The heroine admitted she was 'kissed' by the hero, and nobody thought she was easy nor ruined? 
 -Didn't it EVER cross the heroine's head that she could get pregnant from all the 'encounters' and that she could perhaps be WORRIED? I mean, the first time she was lucky... but the second? And the third? Weren't women's entire Victorian existence worried about such a happening and aiming to avoid it at all costs? Shouldn't she have at least THOUGHT about it? This aspect of the story felt as if I were reading a contemporary romance, although even those usually mention some type of protection. 
 Anyway, besides the glaring inaccuracies, I found the story to be funny, entertaining, and I'm looking forward to reading this author's other books in the series (hopefully better researched), which is why I gave it 3 stars.