A showdown in the desert has pitted Lohan vs. Lohan...vs. Lohan. Again. The dysfunctional family has come together to show its support for Lindsay during the Betty Ford Center's Family Week. But there's one member who crashed the party without being on the guest list, and that's the usual suspect - daddy d-bag Michael Lohan. He's planning to stoop to even lower levels than we'd usually expect in order to get into the rehab center to "help" his daughter.He's already been spied at a hotel near Betty Ford in Palm Springs, and when TMZ reached him for comment, he rationalized, "If Lindsay's problems stem from me, then I should be involved in the treatment ... right?" In other words, if there are cameras around, then he should be involved. A few days ago, the former addict claimed he'd fall off the wagon and be admitted to the center if it meant he could see his troubled daughter again. Sources believe that MiLo's presence on the scene can only be bad for the Inferno actress's recovery. "It's the worst thing for Lindsay as she tries to get well," a source tells RadarOnline.com. "She needs to focus on herself and her problems and not be wrapped up in her parents' fighting." Mom-ager and hanger-on Dina Lohan is on the scene - but she and Lindsay's siblings are on the approved list.