Hi. I didn't actually make clear in my post that Tamora is actually pregnant now. It's interesting that you said that we're effectively imprinting our human emotions onto the cat. I guess they are domesticated animals and the mothering instinct isn't as important. I will mention it to my wife...
We have brother and sister cats Titus and Tamora. They are both incredibly friendly and also affectionate with each other. Titus has been neutered but Tamora hasn't as we feel a female cat should always get the mothering instincts of nature, at least once. Our concern obviously rest with Titus...