The pregnancies are magical and creates mindpoints used to subdue people. No child is conceived in the pregnancies.
Which detective? The female one that Ava made a slave? She will be back in the main story
Kobe's girlfriend wasn't planned further, but many people wanted her to be part of the harem, so now in the future she probably will be.
Nothing happened to Sarah's parents, they live on without knowing their little girl is corrupted.
Thanks for answer