On Fable II anyway: After her resurrection and after you are married (she's bisexual, so you can have her regardless of your character's gender), have her follow you to a bed somewhere, perform the "Come Back to My Place" Expression (found in a book you can buy at the Bowerstone Bookstore), and then have a good time. Make sure you hold down the A button to hear her "Oh!" face. :)
Oh, and just so you know, she'll accept whatever multiple partners your bring, though you might want to give them the "Come Back to My Place" expression a out of her sight... she's a tad jealous.