The comedy/drama, which was screened at New York's Lesbian, Gay, Bisexual and Transgender film festival NewFest on Saturday (28Jul12), tells the story of a family whose individual members are looking for love.
However, Lahti, 62, struggled to cope with recording the raunchier scenes of the film.
She tells the New York Post, "We did that scene on a dining room table which, I understand, others have done. I tell you, my back was hurting. But I wasn't naked. I've never done that in films, I'm too old to do it now. We filmed it movie style. Post-lovemaking. Like he's bare-chested, and I'm pulling up a (bra) strap."