So Santi is MC's dad and Gabi's bloke and Gabi's no longer with him. Mr Monroe (assuming that Ana took his last name and didn't keep her maiden name for professional reasons) is L&L's dad and no relation to MC. Thus no incest for all these 'cest fan hangers on & my thought that they could be actual roommates in college or just friends from way back when could be true.I'm sure there will be a clean break up with Layla option, Nyx always gives the option to "do the right thing" with that said i love myself a messy route, seeing how they crossover and affect each other, it's the highlight of this game imo.
Mr Monroe(Alexis, Layla's dad) is always shot from the back, i think the bartender calls the guy you meet on the bar Mr Navarro(might need to check).
If we go to Gabi's place in this update, we see that Navarro has been on Gabi's case since she was a high school student and also they might be broken up at the moment(provided you have been hitting it at least), she also wasn't worried about who could be at the door.
Also Santiago Navarro makes more sense than Santiago Monroe.
And Layla sucks at Spanish, that's not usual to people with Latino heritages
Not saying Nyx can't just say "fuck it" but it wouldn't make much logical sense.
As for not speaking Spanish in their house, my grandmother had a very Spanish last name and couldn't speak a word of it. Not all families celebrate their culture. Speaking of that the Monroe name could just be an anglicized version of his last name, similar to how James Roday changed his name or he could have pulled a Martin Sheen and completely changed it...