Complex sentence: Olga observes that Frascovia bears a very striking resemblance to Alexis and to deflect suspicion, "Frascovia" tells Olga and Orsakoff that "she" is Alexis's sister.
Split into simpler sentences: Olga observes that Frascovia bears a very striking resemblance to Alexis. To deflect suspicion, "Frascovia" tells Olga and Orsakoff that "she" is Alexis's sister.