The industrial revolution could not have happened 2000 years ago. Any kind of practical machine running on steam power has to contain the steam at very high pressures, and ancient metallurgy was nowhere near advanced enough to create a vessel that could survive those kinds of forces. Even during the actual industrial revolution components in early steam engines would fail all the time from the stresses they were put under, and that was with the ability to manufacture metals that would be the stuff of science fiction to the ancient Greeks.
Yeah, historically inaccurate pondering is unacceptable in my entertainment, lewd or otherwise.
Also I also agree with Andry, and would like to add that, in terms of passing on your chromosomes, a kid with your sibling (or child or parent assuming none are also inbred) is only half-credit of an outbred one.
C'mon, you two, be fruitful and multiply: three more!