In MY opinion....it would be to meet now, or wait until much much later (18)
I think, and anyone feel free to correct me, that it would be best to get this out of the way before she gets too much older. Puberty is hard enough, let alone adding this other element. If you do it now, it may give her some peace of mind and allow her to move on.
I'd probably arrange a get together. Nothing fancy or anything, just a fun familiy activity.
See what happens, you don't have to commit to anything as far as future gatherings right off the bat...see how she reacts..discuss it with her after, and go from there.
Or, if that sits really badly with you....dont
Follow your gut.
Leigh