Life is supposed to get better when your fiance goes to rehab, but 22-year-old Breanna Tierney
's world fell apart after her live-in boyfriend, snowboarder Riley Giles
, reportedly had sex with dopey Lindsay Lohan
in a stairwell at the clinic. Riley, who gave Breanna an engagement ring of fake diamonds, will probably be discarded by Lindsay as soon as she has access to a wider pool of potential stairwell partners. Should Breanna even consider taking Riley back?