First Time Fantasy

If I am wearing a gstring it is either pushed to the side or ripped by now. My ass has been pre-lubed with just a little bit of olive oil in case this were to happen. I try and start to push his hands away even though I am still kissing back. He is just too fast and strong for that. He has a hold on me and is already starting to try enter me with his huge cock. Everything is happening so fast I do not know what to do. He had mentioned earlier not cumming for a week just to have a build up for me. I relax for maybe a second or two and he takes his opportunity fast, as his head rubs and enters me, I still try to stop but that just seems to make it worse because I loose my balance and end up completely supported by him. I try to close my legs but that also make it worse because he enters smoothly at that point. It feels good and it hurts just a little because a real cock is not like a toy.
I let out a moan of slight pain and pleasure and relax again out of being tired and he immediately pulls my legs apart hard. He goes in deeper and pulls me down hard. I say please stop but he turns my head again and force kisses me. He knows I like it. I am moaning in pleasure which he reads and is thrusting me from under me. He is now pulling my hips down hard in between keeping my legs open and on him and his strong upward thrusts. He moves his hands up and pinches my nipples and then to my shoulders to pull me down hard again.
This seems to last about two minutes I am alternating resisting and relaxing the whole time. The naive me continues to kiss back. One heel is falling off. He suddenly pushes me forward so I land on the floor with one heel on and another i am balancing on and bends me over far. I have both feet on the ground and forward bent as far as I can go, so far it hurts and he starts to thrust really hard like that. This lasts for another minute before he does one fucking thrust really hard and deep and starts to cum. I can feel the juices going deep in me. I have never had anything in me this deep before or in either of these positions. I moan in pleasure as he cums. I can actually feel the hot fluid in me. He pulls out as soon as he is done and i collapse to the floor. He came so fast out of passion and desire. That flatters me.