Heather & Richie -- Blood Brings Them Together

10/20/2008 7:00 PM PDT BY TMZ STAFF
Heather Locklear and Richie Sambora have something in common other than his and hers DUIs -- their love for daughter Ava.
Heather & Richie: Click to watch
The ex-couple (plus Richie's new GF) reunited Saturday night at a hotel in Westlake Village, California to celebrate Ava's 11th b-day -- and though their Denise Richards-riddled split was rough, everything surprisingly looked A-O.K.