What Tessa has in spades is what an old fashion term stated, " Face of an Angel, body of the devil '.
When she smiles, she has that girl next door aura which makes any red blooded man find her approachable, safe to be with and protective toward her. It brings the best in a man. But then you see her body, especially those perfect breasts, and your morals may suffer a setback. You only wish to be enraptured with her in blissful delight.