I got the same problem. I'm guessing you chose to seduce her with charisma and not clean rape her. I'm guessing that story path where you use charisma to win her over is not ready at the moment or it's bugged. Another possibility is you as well chose spire lair and there is something incombatible with spire base and her preggo story line. Any way if you want to get to preggo story line you have to rape her without using charisma. Both mouth and eyes still obstructed. Don't know about potency if that way works any better. If there is problem with base location and not with charisma, potency seduction part. Sunken temple or what ever it's called worked for me. Hopefully this helps.