I was quite shocked when Shae was found in Tywin's bed. Not surprised but shocked. What an evil bastard Tywin was. First the Tysha episode & now Shae. After all that he berated Tyrion about his whoring and his (Twyin's) many tirades about whoring in general and of course his last word's to Tyrion, he was a double evil bastard with a heart of stone - certainly NOT a heart of gold.
Now to the matter at hand: was Shae playing Tyrion all the time or did she really love him?
Being a survivor, she saw in Tyrion a great opportunity to advance her own interests. But call me a softie, I think she did have feelings, if not love for him, until someone - Tywin - made her a better offer. Then, I ask, was Tywin motivated to steal Shae away by his great hatred for his own son? And if his hatred was so intense, why did he appoint Tyrion as Hand of the King? There was definately a very complicated father/son relationship there; worthy of more discussion & analysis.
In my own demented fantasy, Dany & Tyrion meet and she falls madly in love with his wit & cunning ( and the fact that he has 1/2 a nose & two different collored eyes!) and they rule Westeros together: Beauty & the Beast. All hail Danaerys Stormborn and Tyrion Lannister, 1st of their names.