It's so hard to resist her, your beautiful and smart girlfriend. She always gets what she wants, which is why when she brings up a mmf threesome, you know you'll end up agreeing. She doesn't make it any easier by slowly unbuttoning her blouse, letting her skirt ride up to show her hot pink thong. It's enough to distract you, to carve away at your resistance. She really wants you to just try it, to just let her make you try cock.