Order of Eastern Star (PHA) and Ladies Auxiliary of the Knights of Peter Claver

[lulutnl3]

Background: My half-sister's mother is an Eastern Star (under the Blue Lodge) and her family is full of Masons, Shriners...etc and my brother-in-law is a Mason under the Blue Lodge as well.

I asked them the following questions, and they weren't too sure of the answer so I wanted to ask people on here since I've seen some posts about OES in the past:
I'm still an undergrad in college and am not actively looking to join either group right now, but I am interested in both and wanted to know if a) Can you be a member of both Order of Eastern Star (PHA) and the Ladies Auxiliary of the Knights of Peter Claver and b) If you have relatives in the Blue Lodge, would you be able to join OES under a Prince Hall Lodge?

My sister's family is White and didn't know too much about the rules of PHA Lodges......at all. So I thought I would take my chances and ask here.

Thank you!