Jill looked at her brother thinking to herself, "Even for my brother that is a nice cock." She sat up on the bed, and patted beside her, waiting for Danny to sit down. When he did she said, "Now, remember we've already done a lot, so I am pretty much ready for more, but when you are first with a woman, you got to take your time, get her aroused enough to get wet, otherwise it won't go well when you try to get your cock in."
"Yeah, that first time I tried it, we kissed some, I put my hands in her pants and finger fucked her for a while and then we did it."
"It's going to take different women different time to get ready. That first time, was it a bit tough to get inside her?" she asked.
"Well yeah it was, I took it slow but I still think it hurt her."
"You've got to take your time, it may be best to keep up with the foreplay until she makes a move to get you inside her. Just keep caressing her breasts and her clit and pussy and hopefully she'll get ready for you.
"Here, why don't you give it a try," Jill said, scooting closer to him and arching her back to present her breasts to him. As he moved his hands and mouth to her large breasts, she encouraged him, "Yes, that's nice. You can bite the nipples but only very gently. If she wants it a little rougher, let her be your guide."
Danny had one breast in his hand and he gently squeezed it while sucking her nipple between his lips and letting his tongue circle over it. He felt the nipple harden even more than it had been for him. After a while he let his hand move down from her breast, down between her legs where he dipped his finger into her pussy getting it wet and then sliding up between her lips to find her clit.