Hi. First off, I would say your wife takes very good care of herself and looks like she's in her early to mid 20s. Second, you're making great progress! Feels like you're doing better than most guys who get frustrated or who's women aren't very open-minded at all. It seems like your lady is but has some hesitation...
which is normal. At least she's open to watching porn movies with you and is letting you choose the theme.
As with most women, they don't want the world to know how slutty they can truly be. I found it interesting that she was into your idea going to a club and dressing up kind of slutty/revealing and "acting single" while random guys flirt with her. This may be your best bet into introducing her to this lifestyle. Do you know if she was real or secretly slutty in her teens and 20s? I'm thinking getting her to try BBC will have to be a long term goal as some Latinas are still raised conservatively and negros(black guys) are a no-no. Though, this is changing and a lot more of them are dating or marrying black. It's different if the guy is black Latino. Anyways.
You may want to go the swinger route with your wife. Though again, baby steps. That way, she can "feel single" and meet up/fuck guys while you watch and eventually join in. If you two can eventually meet IR couples, then you'll be all set.
Can't wait for more updates.