I don't see why not! Cheyenne would be fine with someone else there while she feeds if it makes the person being fed-upon more comfortable. So long as they stand behind her, of course, so there's no chance of them seeing her eyes as well and getting nommed. :]b

As for seeing the process of feeding, that's all good by me too! But on that note, does that mean they'd be able to see Cheyenne's partial-soul as well?