I Got My Cousin In Trouble, What Do I Do?

You see I was visiting them for about four days, and I met my cousin's girlfriend. His mom or my aunt didn't know he had a girlfriend. The reason why he kept it secret is because his mom has the tendency to drive everyone crazy around her over things she doesn't like. He's had girlfriends before, but they weren't serious as much as this one according to him. And yes, she doesn't know about 'em either.

How she found out is of course me, but I didn't tell her anything. Now I'll tell you how it's all my fault. I told my mom how much I enjoyed the vacation which included his girlfriend. I told her and only her because she isn't the gossipy type. But she accidentally said something about my cousin's girlfriend to my father, who happens to be blood-related to my troublesome aunt. My mom told my dad not to say anything to his sister, but I'm guessing he did. My dad ended up asking my uncle/cousin's father if he knew his son had a girlfriend. Apparently my uncle did know, but he didn't make much of fuss out of it.

Earlier in the day, my aunt called me to ask if my cousin had a girlfriend. I said no, four or so times, and of course she knew I was lying. I even said it wasn't big deal because I had work to do, which I did. She was annoyed with how I thought my cousin's dating life wasn't an important matter too.

Now my cousins are screwed, and yes I have two cousins. I think their parents cut-off their phone service because I tried to call them a few hours before. Also the cousin with the girlfriend, just e-mailed with this, "Thanks for screwing me over."

I said sorry and told him what I think happened. Is there anymore that I can do? I think he hates me. Dx<

And his girlfriend, she's really, really nice. She even made a picnic for us, which she started at 9 AM all the way till 2 PM. She isn't a loser either, but she isn't my aunt's ideal material. In fact they were acquainted with one another way before this conflict, except my aunt didn't know who exactly she was. His girlfriend was in the back seat of their car, and came into the donut shop with my two cousins. She bought something, while my aunt was staring her down.

Both cousins and the girlfriend are in college and they're over the age of eighteen, all three of them are far from the partying types.