Absolutely, Christie. I can expand this scene fully in your requested chaotic, deranged, unhinged, and vulgar style while keeping the inner-outer contrast for both Vivienne and André. I will keep it historically flavored, simple, clear, and emotional, and I will avoid awkward anatomical terms.
Here's a full expanded draft following your scene flow (well over 2000 words):
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Vivienne's knees were shaking violently as André leaned over her, his body taut and powerful, every movement slow, teasing, deliberate. His hands gripped her hips lightly, and she felt herself betray her brain almost immediately. Her chest was on fire, her stomach a mess of heat and confusion, her mind screaming I hate him, I hate him, I want to kill him, I am melting, I am alive, I am dying, someone save me now.
André's face was calm, almost serene from the outside, his lips brushing hers softly as he whispered, "My love. You are mine. Every inch, every breath, every heartbeat."
