How Can I Convince my Mom To Let Me Have Sims2 Or Sims3?

I'm 12 years old and I want to play Sims! It seems so cool, creating Sims and see how they react to specific needs and items, the problem is, my mom thinks I'm too little for it, It's the ual content sometimes, and " Suggestive Themes", how do I convince her That I am responsible enough to have the Sims! And, if you know an actual Sims Game, Not Mysims, that doesn't have Suggestive Themes or ual Content, PLEAS COMMENT AND TELL ME! By the way, what does Suggestive Themes mean?