Actually I don't think her link is a referral link, it's just the standard one.
Here's a better referral link for new customers that gets you an extra $5 "deal bucks" for future purchases (doesn't benefit me at all)
1) Go here https://livingsocial.com/redeem_invite/22602505-thefos?ref=lnk
2) Enter email, click green link
3) Click buy now and fill out rest of form