Does touching one's private parts invalidate ablution, and does "the boundaries" refer to the pubic hair above, or all sides? And does ablution become invalid if the barrier is transparent?

A woman's ablution is not invalidated by touching any part of her body except her private parts (the exit points for urine, semen, and menstruation). It is not invalidated by touching the labia or the pubic area. Similarly, ablution is not invalidated by touching something through a barrier. It is advised that those afflicted with obsessive doubts should disregard them.