The gal's sister is clear.

She herself has it (but she is not tall). Her aorta dilated severely with her fourth child, but went back down after. So she was advised not to get pregnant again.

All of her children test positive but only one daughter is tall so far.
This young woman has already had ankle tendon problems and she is in her early 20's. (she is over 6ft tall).

There is a very mixed presentation for it genetically and it remains hidden for many. Anyone with loose tendons, or who are hyper-extendable should be tested just as a precaution.

Right now the gal I know is having mega problems with her knees. She is pretty thin and has no risk factors for OA...but her loose joints/tendons put her in a stress
situation and she has to wear a brace sometimes.

Sometimes a simple thing like your dental work, can be a sign pointing to
something else. I only offer this as a suggestion, so you won't be caught
unawares later.