You feel her walking around for a while, occasionally tensing up around you for some reason. You grow used to the spasms after a while. That is until she starts to really squeeze down on you. At first you think she is just trying to get you out of her, but you realize what she has in store once you start moving deeper.
Once you reach the destination she has planned for you, you smile and try to help her. You are being pushed up against her cervix so you push an arm inside her womb and gasp at the difference in temperature as well as the spaciousness of it. You keep pushing while she tries to get you into her hot chamber. Several minutes of her cumming and you slowly forcing your way passed the tight hole of her cervix and you manage to get inside the mare's womb. There is enough room inside for you to be comfortable, but not to stretch out.
You yawn then decide to curl up and take a nap, seeing as your new mommy doesn't seem to have any plans on letting you out any time soon.
