@Gambino If you are talking about Kazuya's mom, Kanaka, and Kiriha then yes, they definitely scissor some timbers and have a sexual relationship. Kiriha's seeming lack of inhibition was cultivated by Kanaka.
"You want to be the local exorcist? Be my guest, I never wanted to be it in the first place and was blackmailed into it! Now, the door is that way, and bring the useless god with you!"