Put her in a leg headlock.

You grunted in pleasure as Bella's lips closed around your cock. The bellossum smiled up at you as her mouth immedietly descended down your shaft, taking your entire length into her mouth and throat. The feeling was incredible. Bella knew exactly the right amount of pressure to apply with her lips, exactly the right places to put her tongue, exactly the right amount of suction to use, the exact everything. You immedietly realized why this girl was the Best Blowjob Winner.

"Don't- think I'm- finished yet." You managed to say as you swung your leg up with great difficulty, locking the bellossum's head to your waist. The grass type let out a grunt of protest with her mouth full of your cock as your hands went to the back of her head, holding her fast in place. "If you- want my- cock- I'll give you- my cock." You began trying to thrust your hips up, semi-successfully facefucking Bella despite the spores effects.

"Mmmm! Hmmm! Mmrgk! Hhgrrk!" Bella choked as you fucked her face, your plan working for the moment. The bellossum's hands attempted to removed your leg from the back of her neck. Her attempts were unsuccessful, but much to your enjoyment, she never ceased her sucking, leaving your cock in the heavenly embrace of her mouth.

Soon things began to feel REALLY good. Bella's suction seemed to steadily increase as you fucked her mouth, a fact you were fine with... At first. Now though, it was becoming a little painful. Still pleasurable, but there was an undertone of discomfort that was slowly growing with every passing second your cock remained in the bellossum's mouth. Then it slowly dawned on you. Giga drain! Bella's special technique. She was literally trying to suck you dry. You felt your arms and legs growing weaker and you were starting to lose your grip on Bella's head. You had to do something, and quickly, before Bella could end this herself.