48 hours is fine, it's still a break in between.

I don't like Upper Body and Lower Body workouts because of intensity levels. I also think that constantly giving your muscles only 48 hours rest (or 72 or would it be 96 for the one day you take off) will lead to problems. If you talk to this woman again tell her what you plan on doing, to me it's too much. If you can put the same intensity into everyone of your exercies for an upper body day then you aren't getting an effective workout.

I can tell from your wording that you really want to train everyday and we definitely (plaw?) differ on that, what I will say is be careful.