You can share your prime benefits (next day delivery) with up to 4 members + prime instant video with up to 1 member.
Some of our users have indicated these family members don’t actually need to be relatives at all however we don’t condone anyone doing that as you risk spoiling it for everyone.
1) Go to Manage Prime Membership.
2) Click Invite a household member.
3) You can then do the following:
Share your delivery benefits by entering the name, relationship, birthday, and e-mail address of the guest along with your birthday.
Note: Your invited guest will need to know the month and day of your birthday to accept the invitation.
Amazon Student accounts unfortunately can’t share their accounts with family members.
More info available on http://amzn.to/1BOPkDr