Please listen to your own words... and look after yourself. If this situation is too damaging, then stop it. Sounds like she is a bit mixed up, and she needs to sort herself out before embarking on any type of relationship, even just sex and I wonder if you still want to be together, so the coldness is hurting too much?

And.. I can think of no damaging ill-effects on hormones from being celibate, I think any ill-effect she may be having would be psychological.

Good luck, and please be careful. You guys have to have a relationship of sorts because of your daughter, and I hope all of this doesn't make things harder for the future.

Hugs.