The accent give away who she was, not that Olivia didn't already make the correct assumption when she saw the woman. "You must be the Duchess then, I am Olivia Blake, Christopher's sister." she gestured to Olga. "This is Olga my..." Lover. Companion. One and only. Love of my life. None of them would fit, obviously, so she scrambled to think of something. "Maid." When she realized that the pause had been a bit too long she tried to explain it away for fear of the woman coming close to their secret. She looked to Olga then back to the woman before her. "She's new and we're still working a few things out you see."
But when she realized she may have been rambling a bit too much about Olga she offered the woman a sweet smile. "A pleasure to meet you finally, I'm afraid my brother has been rather tight-lipped on your account, but the things I have heard about you are very good, I assure you."