How to share only some pictures on Facebook?

[SickOfTakenUsernames]

My aunt's posted all our family holiday pictures on Facebook and I want to share some of the pictures with my friends.
I know how to share an album and I know how to share individual photos, but my problem is there's only about 15 out of the 100+ photos that I want to share with my friends.
I don't want my friends seeing lots of images of my aunts, uncles, cousins etc - who would all be strangers to them - so I can't share the entire album, but I also don't want to share each photo individually as it would spam everyone's timelines and stuff.

Is it possible to share only a group of pictures from someone's album and, if so, how do you do it?
Thanks in advance :-)