You're MinPin is only 12 weeks old? She's still just a wee puppy and it will likely take some time to teach her to be fully clean in the house. Supervision is key (she shouldn't have access to the entire house nor blankets and clothes) as is taking her out frequently (every 30-60 minutes) and rewarding her when she does go. You should also work in the same manner to house train your older puppy. Here's a great video to start with http://www.youtube.com/watch?v=QvPiFcG7ROI
I would also recommend you thoroughly wash and rinse every spot that's been urinated on and then soak with an enzymatic spray such as Nature's Miracle to eliminate any residual odors. Don't wash with bleach or anything that contains ammonia.