Okay. My situation is this: I've been with my girlfriend for a year and 9 months. She comes from a conservative family. We had sex for the first time (she was a virgin, me not) in september. And today her mother found out that her daughter wasn't a virgin anymore. My girlfriend tried to talked to her but the response wasn't very positive. So, my girlfriend and I decided to go talk to her tomorrow. I need help of what to say or not to say.
PD: we live in mexico just so you get an idea, my girlfriend has 18 years.

well well! if you live in mexico you probably know the mother will want you marry, the least live together with her daughter, it's up to you my friend, how much you want to commit? if you love the girl and you are sure she is the one, the answer is very easy tell the mother you love her and you are willing to answer as a man to her.
the mother would be pleased and you going to be a hero to your girl's family and you would be nicely accepted
lol!
now if you only want to fuck the girl and still want to go to talk to her mother then be sincere and tell her that whatever happened happened but you are not ready to commit but you are willing to respond if she gets pregnant, not very easy to tell you future mother in law that, but you going to have to...this is what I would do honesty is better.
just my two cents.

good luck!

Talk with your girl first about how you truly feel about her and where things are going. Because as far as your concerned the only thing that matters about you two is you two, not nobody's mama. So if you're not ready for marriage let her know. If you love her and wanna take things one day at a time and see where it goes, tell your girl.

Now what you tell the mom is completely different. LOL! You go to the moms house and tell her that you want to marry her daughter when the time is right. The mom is going to say "what the fuck time is right RIGHT NOW YOU TOOK HER VIRGINITY!" Relax. Just tell her that you need time as you want to find a nice job and become stable before getting married. You don't have those things right now, but once you have them your winding her daughter. (Things of that nature) The mom will love to hear this. You'll come off as responsible lol