Hi Jackie,
Many women think they are doing pelvic floor exercises but then don't do them correctly, or do them inappropriately. She needs to be checked vaginally. Checking if she does TrA correctly is important, but it is possible to contract it and still be bulging the PF. She needs to learn to do the exercises well but also functionally.
To determine the type of incontinence she needs a comprehensive assessment. Many women with urge incontinence do PFX's without much success, but learning how to control the bladder does wonders.
If you don't have the experience to assess/treat this how about asking your local continence physio for a consultation? We don't bite!
Irma