Some very good actors give their all to Jeff Lipsky’s “Twelve Thirty,” a wildly misanthropic and overlong black comedy about an Iowa college student (Jonathan Groff, of Broadway’s “Spring Awakening”) who successively beds a pair of sisters and their mother.
Pretending to be a virgin, he lets a sexually aggressive sister (Portia Reiners) seduce him, while he date-rapes her whiny sibling (Mamie Gummer, the perpetually ill-used daughter of Meryl Streep) in a closet during a party. Following that, there’s a session with their mother (Karen Young), who still occasionally sleeps with her gay ex-husband (Reed Birney).
Somehow this brings the deeply dysfunctional family together. Sounds interesting, but in the hands of director Lipsky (“Flannel Pajamas”), it wears out its welcome well before the two-hour mark.