*this comment includes spoilers*
You should include some dialogue or an acknowledgement that Hannah belongs to the player, now. Maybe her adopted parents send you her collar in the mail with a note asking you to "take good care of her" ;) Given how she reacted when she first learned the PC has a elf slave, she should loose her goddamn mind when she officially becomes your property. And then she and Maria will be sisters again!
Also, when you finally add pregnancy I hope you don't skip the "side girls." Hannah is just begging to be bred and Kali is too busy with work and school to produce an heir for Nero Inc... but Luci doesn't have anything better to do.
Edited to add: love the game, keep up the good work! I'll send you another $20 when I can finally fuck a heavily pregnant Hannah