If you're waiting for them to do it again, you'll be waiting a long time. This can be a slight spoiler, but I've read the raws upto around chapter 1100 and they still haven't done it. It will only happen again when MC reaches/surpasses her cultivation and she's super OP (although she's injured). There's quite a few sexy scenes with her in between though. Its basically a slow-burn romance and it'll be great to see what happens when he reaches her level since she's been quite stoic about it all till now.
under_boob:It started off pretty hot, and steamy but she doesn't even give her until 133 chapters later.[img=Loving it]