Sharp
Faith starts it, but Lilah has been after it since the moment they met. Nothing out of the ordinary: hard kisses, nails digging into smooth skin, mouths and tongues exploring velvety warm folds of flesh.
There is also the letter opener Faith holds against Lilah as they writhe on the desk. She starts to trace patterns on Lilah's belly and breasts, a little prickle here, a longer cut there, always where people can't see it under soft fabrics. Lilah has a reputation to keep.
In the end, Faith has to press the blade against Lilah’s neck to make her come.