Does anyone else think it somewhat likely that Penny and Tyrion are related? I've been trying to figure out where GRRM might be going with her, and this seems... at least somewhat plausible, although there's some issues with the theory, I'll admit upfront.
The argument is, essentially, that Penny and (possibly) Oppo are the legitimate children of Tyrion and Tysha's tragic wedding. How it happened would be as follows:
-Tysha becomes pregnant by Tyrion during the two weeks or so that they "played as husband and wife", before she's raped and sent away from Casterly Rock.
-Tysha uses the money to procure a ship and sail to Braavos or some other distant location. She learns that she is pregnant.
-Wherever she ends up, she meets and marries a man who is a dwarf, who becomes Penny's adopted father. Oppo is either a young child from a previous marriage (if he's older), or he's actually Penny's twin, since twins are known to run in the Lannister family. In that case, he's only older in the sense that he was technically born first of the twins. Both Penny and Oppo inherit dwarfism from their father's side.
-If Oppo is Tyrion's, it is possible that he was murdered because he, in fact, does bear some resemblance to his father beyond being a dwarf.
-Penny finds Tyrion compelling because he reminds her of her brother, which makes sense because Tyrion might resemble her brother both physically and have a similar personality.
-Unfortunately, we don't have much of a description of Penny, Oppo, or Tysha. It's a little surprising that we don't have more details about what Penny looks like considering how much time Tyrion spends with her. Tysha has dark hair, Penny has brown hair and brown eyes. Nothing nearly distinctive enough to be conclusive.
There are a few problems to be resolved for this to work:
-Tyrion believes that Penny is seventeen to nineteen. This figure would have to be off by three to five years, since Tyrion is apparently about age 28 at this point in the story, and he met Tysha when he was around fourteen, meaning Penny would have to be about fourteen. Now, getting someone's age wrong by a couple years is not impossible, especially if there is somewhat of a large age difference between the two people. Penny's dwarfism might make it difficult for Tyrion to be able to make a good guess anyway, since, despite being a dwarf, he doesn't have that much experience with other dwarfs. Personally, I feel that Penny's personality probably fits a fourteen year-old better than an eighteen year-old. Tyrion comments that she reminds him a lot of Sansa, who is quite a bit younger than how old he perceives Penny.
-The brother is the big problem. Oppo either has to be a twin, or a child from a previous marriage.
-It's hard to imagine Tysha wanting to be with another dwarf after what happened to her, although, perhaps if she had her dwarfish child/children first, she might have wanted a dwarfish father for them to avoid having to explain...