If I really love my child, why would I prevent someone else loving her (or him) if my child wanted to be loved by someone else?

For that matter, why would I not lover her (or him) if she (or he) wanted to be loved (in that way) by me? I find male homosexuality distasteful but, should my child ever want me to love him that way, I would do my best to please him, hiding my unease the best I could.

Consider the hypothetical scenario assuming there is no abuse involved:

A little girl, however the instigation, becomes sexually aroused by an adult lover and, while approaching the pinnacle of sexual pleasure (for her), a third party becomes aware of the ongoing activity and the little girl approaching said pinnacle (I mean, she's rather blatant about how close she is, etc.) Should the third party (whomever it might be) immediately stop the activity (preventing the little girl's conclusion of the sexual experience) simply because it is illegal?

With all the safeguards mentioned by JackSummer, walkinginthepark, and hieronymus (the three that have responded before me), the only thing to rule here would be the four letter word, "love". Yes, sexual pleasure for little girls is, well, pleasurable.