Use your arm to sweep her foot on the ground

As the corner of her lips begin to form a smile, you use your right arm to sweep her grounded leg out from under her. You pull her ankle and her grin turns into shock as she falls backwards, as if she expected you to fight against the foot on your chest. She falls into a muddy puddle with a splash, covering her back and hair in mud as you re position yourself, ready to take her sports bra off.

"Oof!" she cries as her firm butt lands on the ground, soaking herself in mud. Before she has time to reorient yourself you tackle her, pulling her sheer bra over her head. She tries to fight back, but wasn't expecting the sudden attack so you manage to slid it off without too much difficulty and toss the muddy bra into a nearby bush. You smile after putting you two in an equal state of undress and admire her perfect breasts as they glisten in the rain. Her breast are firm and perky, with quarter sized nipples to match. You would have to guess they are a d-cup, and around her left nipple is a tattoo ring of pink and red flower petals. Her chest heaves slightly as she breathes, causing her boobs to jiggle slightly. The sight of her perfect exposed chest causes your penis to reach its full erect length and presses gently against her thigh.

"Oh, finally decided to even the score?" she asks with a smirk as she pushes you off of her. "But unlike you, I have something to show off." With that she pushes her breasts together, accentuating her cleavage. You both stand up slowly, making sure you don't slip again, and face each other, waiting for someone to take action.