erotic stimulation especially of one's own genital organs commonly resulting in orgasm and achieved by manual or other bodily contact exclusive of sexual intercourse, by instrumental manipulation, occasionally by sexual fantasies, or by various combinations of these agencies
Even if it's your clone, it's another entity, and not to yourself. Therefore, it doesn't count as masturbation. Homosexual, yes, because you cloned the gender. Incest, yes, since it's within society's accepted measurement of how far blood relation goes before it becomes familial. Child molestation, I don't think so, since that's dependent on maturity state of body, not age.
As for changing your clone's sex from male to female to create a baby, um... it probably might have the same genes. I can't remember exactly how probability works in genes in terms of dominance and recessive genes.