I've answered similar questions before, but I'll try to give you a more precise answer. I am critical of the approach where content is only obtainable through definitive, final losses. To tell you more, I am sympathetic to the ideas of Pilgrimage. The concept of straightforward lewdness was discarded and made dependent on player actions, justified by the fact that Haydee is a robot capable of making her own decisions (and also by Cobalt's advice to give in, since nothing terrible will happen if she surrenders herself to a monster).
Sex is not secondary. At this current stage of development, I am dedicating more time to building a stable foundation for the game than to animations and sex content. Priorities will shift towards the latter once I am satisfied with the technical state and the implementation of all the systems I want to have in place.
Regarding the impregnation system - I'm not ready to say for certain whether it will be implemented yet. As I've mentioned, the current effort is being invested into the game's core elements. Furthermore, I plan to start looking for an animator and a modeler to join my team after the release of this update. This would speed up the development process somewhat and improve the quality of the content. I simply accept the fact that I'm currently not very good at animations, and improving my skills in that area would likely take significantly more time. That's why I'm focusing on what I do best—programming.