You did offer to help

You walk over to Emily slowly, half confused, half entranced by the sight before you. You get within arm's reach and stand there, looking between her, her ass, and your dusty hands. "Well go on, give it a spank!" she says, grinning. You look to her shapely butt and slap it half-heatedly with one hand, causing a cloud of flour to rise on contact. Her butt is soft and juicy, with a bit of firmness to it. "Come on, don't be a baby! Harder!" You start to get your bearing and give her ass a hard slap, making it shake with the blow. "Mmmm" she purrs, "Much better! Keep going!". You follow directions, alternating hands as you smack her fat ass. You're becoming erect very quickly from this stimulation. She purrs and squeals with your spanking. Her cheeks are now covered in a light coating of flour dust, visibly denser in hand-shaped, red-outlined marks. "Oh god, take me, take me now!"

You don't need to be told twice. Hastily dropping your trousers, you bring yourself up to her opening. Spanking must be a very near and dear fetish to her, because she's already amply wet. Taking that as a good sign, you slip into her slick hole. Emily grunts as you pierce her, throwing her head back and smiling. That gives you an idea, and you grab onto her long blonde hair with one hand while your squeeze her thick butt with the other. "Oh yes! That's what I'm talking about!" she says, voice strained from you pulling her hair. This position gives you excellent leverage, and you are able to take her hard and deep, though the sheer size of her ass prevents you from burying your full length into her.

The primal thrill of taking this woman who offered herself as a mate to you so boldly is amazing. Between the heat of the ovens and the exertions of your rut, you've become drenched in sweat. The resumption of spankings as you fuck Emily's tight hole has already caused her to come at least once, though she may have had a second. Good as this is, you're getting exhausted. One thing remains: to come inside, or not to come inside?