No training pads will not help.
Why is a 4 month old puppy on the furniture??
Get her off of the furniture and into a crate when you cannot supervise her.
The best way to prevent unwanted behavior is not to allow it. Is she crate trained? How much supervision is she given??
Please read all of the stickies in the Puppy Development forum....it sounds like you are not watching this puppy enough and giving it far too much freedom.
Gina