Rosie O’Donnell admitted she was extremely “nervous” to film an intimate scene with her longtime friend Cynthia Nixon on “And Just Like That.” The former talk show host — who played a nun who has her first sexual experience with Nixon’s character in Season 3 of the “Sex and the City” spin-off — described the experience as “horrifying” on Amy Poehler’s “Good Hang” podcast Thursday. “First of all, I love [Nixon]… and have so much respect for her,” O’Donnell said, adding, “The kissing wasn’t hard, but the laying in bed and the wanting us to act like we had just done it… I was like ‘Uhh.’ But I’m a little immature when it comes to that.”…