As for details: For the nun threesome (maybe foursome?) a celebration for helping them could turn into a rather raunchy night if enough alcohol flows.
As for the arms dealer: For more masturbation/toys the witch or one of the nuns could try to order more through you over her. The scenes could then vary depending on the toy. Having her lying on her back or being on all fours and also showing more skin would be nice. Just showing her fully enjoying herself.
For a sex scene our Hero should help her out first, maybe going on a Quest together to secure a shipment. Would also work to get to know her better. Something could happen during the adventure :o)