Your neck.

You thoughts immediately go toward how awkward it would be to explain numerous hickies Fiona is likely to leave on your neck. Your hands dart up to your neck to try to move her mouth off of it. She is relentless as hand fights you but you are managing to keep her from your neck. You try talking sense into her saying, "Fiona, stop this! I'm taken. I...can't...do..." Suddenly, she rears up again and swiftly shoves a boob in your mouth and wraps an arm around your head. She's not quite smothering you but it does make it difficult to breath and she has a good seal. She hisses down from above you, "Shhh Sugah, hopefully some feminine charms will calm you down." In your moment of calm you realize her back is arched, pressing her breast in your mouth but she is also still working your cock. You feel like you're going to bust any second.

As Fiona attempts to switch boobs you seize your chance and push your hand in between her to try to use her chest to posture yourself up. You do successfully improve your position slightly but you are strategizing in checkers while she is strategizing in chess. With her arm still wrapped around your head, she is again at face level. She immediately latches onto your mouth jamming her tongue down your throat. Her relentlessness is awe inspiring but her detraction is the main goal. You realize this as she moans something into your mouth and impales herself on your cock. The shock sends an automatic moan back into her mouth as she assaults it with her tongue. A few skillful raises and lowers later and Fiona breaks off your mouth back to your ear. "It is probably not the best time to tell you this..." She lets out a hot breathy moan into your ear then continues, "But I've been off of birth control for several months now."