Kristin, relax! Ethan, push harder. Fuck her throat to loosen it up!”, Kellie ordered them. Ethan began thrusting steadily, reservedly fucking her throat, not wanting to fully unleash, fearing he would really hurt her if he did. Kristin made gagging sounds each time he bottomed out. She wished he would press harder! She needed his cock down her throat. She knew Kellie could take it all, and although she was smaller, she had to succeed. She couldn’t fail, but there was no way she could do it by herself. Ethan kept this up for several minutes, with Kellie giving words of encouragement to both of them the entire time. Ethan pushed down again and held her there, grunting and telling Kellie, “Any harder is going to hurt her! She doesn’t have to take it all, she’s just too small. It feels great just doing this.” Kellie wasn’t so sure, her sister seemed determined, but they were going to have to try something else to succeed. “Ethan, let her up.”, she ordered. Kristin pulled off Ethan’s cock, gasping for breath and whining to Kellie in disappointment, “Please! He’s still not pushing hard enough! I WANT it to hurt! Tell him to force it down my throat!”.