<human>: Can you provide a brief rundown of the text in within 3 sentences?

I'm (20M) from Wales and 6 months ago I started going out with my now girlfriend (29F) from Colombia.  We both reside in Quito, Ecuador and she lives with her family, I live on my own in a flat.  

Basically the problem is that she doesn't like telling people that we're together, I find this a bit strange and although in Latin America it's normal to hide it from you parents (her mam knows but is a very chilled person, her dad is none the wiser), I feel that she's embarassed to be with someone who is almost 10 years younger.  It's not like I'm an immature little kid or anything, I'm fully fluent in the language and am currently studying Latin American Studies in the nearby Uni so I don't see what aspects of my personality she wouldn't want people to see.  She tells me that she doesn't want the world to know 'as they can be very judging'  but I keep telling her that it's bound to raise a few eyebrows but that if were serious about being together (I certainly am) that we can't hide it away.  

The kinds of situations I feel bad about are when we bump into someone that she knows and she doesn't introduce me, or that when she tells me of her male friends or people in her work who hit on her and ask her out on dates.  The latter more so, as Latin American men are very foreward, especially if they think the woman is single.  I don't understand why she doesn't want to 'shout it from the rooftops' as the saying goes.  I definitely do and we have had many a chat about it and i'm very sure that she is taking the whole thing seriously but I just can't get my head around it.

Is it an age thing?  Am I being stupid about it?  What can I say/do to change anything?  Any advice would be appreciated.
<bot>: Going out with a girl 9 years my senior who is unwilling to tell people outside of her immediate circle of friends about me.