Yes you can but before you do it these are the steps. STEP 1: Change your teen to a young adult using testingcheatsenabled true and than relax on the bed with your male sim. Step 2: click try for a baby and right before they put the covers over there heads right shift the female sim and enter create a sim. STEP 4: YOU JUST MADE A PREGNANT TEENAGER!
Secret - Free Party VIP
If you want to go free to parties you can choose computer wizard perk for your sims then hack one of party centers then If you do it right you can go free to parties.