My "buddy" is suing my insurance company, what could happen?

Ok, So a little over a month ago i was involved in a car accident with a friends car. It was and 1 hr and 30 min drive. My friend said he was tired and drunk, telling me to drive( I was sober) so i did. I did tell him I didn't want to drive because his car was manual(which i can drive, but i've been driving auto for 4 years now. On the way home I fell asleep at the wheel and the car was totaled. None of us were injured, I was good he was good. We did the police report called our insurances. His paid him for his car. Two weeks later he's calling me to come-over to talk. I get bombarded by his family for 2hours basically saying they need money for this and that. The claim was already settled but he insisted i called my insurance company and see if they can give them money because they used the money they got from there insurance to pay off the car(worth about 5 grand) I talked it over with mom because im under her insurance and she said its sounds shady. She calls the insurance company and said dont give him a dime. Insurance is to make you whole again not better then you were. I explained to him numerous times and a week later my mom calls me at work and says gieco called and my friend is suing them. she also said he has a lawyer. He's suing for bodily injury! My told me not to stress it but it bothers me so much. He definitely doesn't deserve anything and especially being in perfect healthy condition. In the accident if you wanna get technical i took all the hits. I know him, my insurance company doesnt. its not right for him to be compensated for some injury that doesn't exist. Whats gonna happen? does he have a chance. the claim opened up is for $25,000 or more. this kid goes out clubbing and partying every weekend and this is how he lies? any input is appreciated. thanks again..