Connor gripped the book hard, not letting the demon get to him, letting the lust wash over him, to deal with later as he continued to chant, to reciete, and to focus on the words. He was nearly finished with the ritually, when the demon spoke.

"She's probably infertile" 

Connor was in a state of perfect stasis, in a mind of calm and neutral, as he changed, so he couldn't let anything distract him, or the ritually would be ruined. He took these words in, locking them away for consideration later. Instead if breaking the chant, he continued, in the same tone. He was bearing the end, and he looked up, seeing the jerking, the normal pain and struggle of demons in this situation. He didn't need to look down. He knew the last few words by heart.

"ut Deus velit!" As god wills. He let the book shut, and stood up straight, his face a blank mask as he waited for the possession to be over, looking up as the priest came down the stairs