Well, that failed the dating age formula. ((age/2)+7) = ? ... but jokes aside. Sounds like one of those case where burnt hands learns best. I mean, you can't really make her do anything. Its a lose lose situation and hope that she grows out of this.

My question is now, where are her parents, and what do they say about this?

WOW!!!! O_o

Yeah, you should definitely tell your mom about this. I mean, you tried explaining it to her before and she didn't listen. :\ Perhaps your mom can get through to her in some way.

Geez, 13 is waaaaaaay too young to be having sex. :\

I wasn't even allowed to date at 13.  I think this relationship is out of hand. 

he's way too old for her! dating at 13 should be about watching a movie together on a saturday afternoon, not having sex and having false hope of marriage!

intervene NOW.  she'll probably hate you for a while, but you might all regret it later if you don't.

You need to tell your mom. Thirteen year olds do NOT have any business having sex or thinking about marriage! That sixteen year old has probably discoved how easily smitten and manipulated little girls are. (Thirteen! She's a baby!) I hope your cousin has a big brother. That's the best cure for sixteen year old punks. ;]

You have to let her live and learn on her own. The only thing you can really do is talk to your cousin as much as possible. Everyone has to make their own mistakes and live with the consequences. If she's not willing to listen to you, telling your mother about their having sex might make things worse. I do not know anybody who has ever listened to someone regarding relationship advice. They have always listened, but ended up making the mistake and living with it. Now it's her turn...

Sidenote: I think dating at 13 is way too young. But look who's talking... I started my first long term relationship when I was 14 and my boyfriend at the time was 17 (me 9th grade, him 12th grade). It worked out for four years and I don't regret it because I made most of my life mistakes in that relationship and actually learned from it. Anyway, despite that, I guess people are "growing" up too fast. My neighbor got pregnant at 13. Everyone has to live their own lives.

Definitely tell your mom! You could very well save the rest of your cousin's young life. This guy sounds like a jerk and one that will dump her as soon as he leaves for college, if not sooner. :-/

Definitely her parents should be involved, told.  At the very least the girl needs to be taken down to planned parenthood and given some birth control.  I think that's one point you should press with her and she should listen.  Girls who have sex that early in life get screwed up emotionally for a lifetime or for many years to come at the very least.  Keep a baby out of that mess.

Oh an how about going to the 16 yr old's parents, or friends?  I think some pressure on that kid might help the situation.  Ideally, if his friends were to razz him about it enough... maybe he'd walk away from it on his own.  If only. 

@SleepyHead - that seems too dangerous. She's THIRTEEN, not an adult. Hell, when I was 13, my mom made SURE I knew that I had no say in--I was NOT ALLOWED to have a boyfriend. I think adults dont know how to raise their children nowadays--I feared my mother, and that's what kept me out of trouble, and I feel like a lot of parents just want to be friends with their children. You let these two kids just go roam free, you're risking a pregnancy, him leaving her and her becoming a single mom. Sure, that would make her learn but I feel like if you can prevent that, you should. I also think giving her birth control is telling her that it's ok to have sex at that age and it's not. I guess if I had to choose, I'd let her get pregnant, she'd def. learn quicker.......but action of some sort is required in a situation like that, in my opinion.

@cubancutiepie@xanga - i understand what your saying. i think the parents need to establish it at first at around 10, 11 whatever the age, and then if she decides to continue doing this, then forcing her to stop isn't going to help the situation. bringing in the parents might just make it worse to the point where the guy might suggest running away or something worse. at that age, in that state she's probably willing to listen to anything. but i do understand what your saying. 

I have a 13-year-old cousin, and I try to share with her the lessons I've learn from poor decisions I've made. I was in a bad relationship in high school and the guy was my "first love," but largely due to my older sister's firm, but loving, disapproval, I got out of the relationship. Teenagers can get carried away in their emotions and can be very naive, so I think you have a right and responsibility to continue to provide guidance for her.

WHAT?!
I wasn't even allowed to have boyfriends at 13.  I snuck and had one anyway and he was my first kiss and we snuck to the movies and stuff...but I was caught b/c someone told my neighbor and she told my parents.  The neighbor first gave me a way out but I guess I took too long to break it off and she came with hard evidence (an aim convo) against me.  I was upset at first because I really liked the guy, but once my parents got involved I called it off and that was it.  He was older than me, but we were both in 8th grade.  But lord knows I wasn't even thinking about sex then!  Where do they even find the time or place?

Anyways, I resented the neighbor for a bit but I got over it.  I don't think I did anything risky besides having my first kiss and going to a movie, and I was a pretty sensible 13 year old anyway and knew better than to let him pressure me to go to bed with him...even if I wasn't smart enough to not get caught lol. Plus, I def wasn't thinking about marriage.  I'd say tell it.  She'll get over it.  He's a lil old for her and you have to think what a junior in high school is doing with an 8th grader.  The fact that the relationship has gotten this far is cause for alarm.  She's trying to make very adult decisions without adult responsibilities. 

Tell it!!!!