There's a special place in hell ..... for physical therapists. Telling them you have some part of your body that is weak is like putting red meat in front of a hungry dog. You don't say enough about your weakness to know if it's treatable, but the preference for skiers would be to get this fixed. A core muscle is a terrible thing to waist.
There are different possible causes for A framing. If you have proper alignment for a normal stance width, then you may have to fight a bit to keep the skis flat on average as you narrow your stance. If you're fighting and one leg is stronger than the other, it would be natural to expect the two legs to behave differently and an A frame could be one result. For most people, the narrower stance and normally lower edge angles (for powder) would mitigate the inefficiencies of an A frame. This may be no big deal to worry about. I'm assuming that you know your alignment is ok and that this issue is totally injury related versus the injury exacerbating an existing alignment problem.
Do you A frame in both turn directions? Do you know if you are shifting your center over one leg to cause the "A" or if it's caused by bowing one knee in? I can imagine how a weak groin could mess up your turns, but I'm having a hard time seeing how it would cause an A frame..
With the caveat of the obvious safety implications of impeding the function of the bindings, you may want to try canting the outside right binding with duct tape to see if this improves things until your groin is healed. Try adding 2 narrow layers at a time on your AFD. Don't go higher than 10.
My mom offers the following advice: Have you considered not skiing until your groin is healed?