<<Since delivery mother has had numerous episodes of hip dislocation
[bilateral], and now has a fractured foot. Her orthopedic doc is telling her
he feels that hormonal influence/relaxin are contributing to the hip
dislocations and is advising her to wean infant immediately. >>

I  agree with Dr. Jack !!  It isn't the breastfeeding that's causing the
dislocations. But it is always the easiest to blame when they don't know what
the problem is.
I ran into the same problem (I had a total hip at the time). Several doctors
told me it was the breastfeeding and relaxin; which lasts for up to six months
post partum BTW. [For me it turned out that I had mismatched parts. I know I
posted about this a long time ago, look for a post under my name in the
archives.]

Tell mom to see a brace maker. There is one made especially for this problem.
It is made of neoprene and looks like a gun holster--it goes around the waist
and around the leg. It is tight and provides external support. They will need
to lengthen the leg part of the holster by about 3 inches to get the right
fit. It worked very well for me and I could wear it under my clothes. Once she
has the external support she needs a good physical therapist to strengthen her
muscles.
Marie Davis, RN, IBCLC