"I hate it when Peter does a love scene," the actress, 30, admits in the August issue of Britain's Tatler. "He's very understanding – it doesn't seem to bother him [when I do one]."
She'd like to keep it that way. "I'd hate it [if he was doing it]," she says. "I'd put up with it, I'd understand, but I wouldn't like it."
Gyllenhaal's breakout role was in the raunchy black comedy Secretary, in which she acted out a full frontal nude scene, something she won't necessarily be making a habit of.
"After Secretary, people knew that I'd get naked, but I won't get naked for anything – only if it makes sense," she says.
Obviously happy in her own skin, the actress went on to act out steamy love scenes in Sherrybaby and even posed up for the British-based lingerie designer, Agent Provocateur, just six months after giving birth to her and Sarsgaard's daughter Ramona, born October 2006.
Loves Role as MomAnd the actress, soon to be seen as Batman's love interest in the much-anticipated The Dark Knight, couldn't be happier in her real-life role as Ramona's mom.
"Motherhood is incredible," gushes the actress. "It's brought me to my knees in an incredible way - it's so humbling."
And are the engaged, Brooklyn-based couple, soon to be walking down the aisle? "At some point in the next 20," she responds casually.