The imprisonment of an unfaithful wife was thought to be exceedingly proper - in a society where there is a patrelinear (HA!! That's foxed the spell checker) inheritance and no DNA testing it is highly problematic.

Victoria's Prince Consort, Albert, was reputedly not the son of his mother's husband, as he did not have hemophilia like his brother Ernest. He was, however a perfectly acceptable social match as he had not been disinherited - being the second son and healthy it was perhaps a sensible decision.

The Saxe-Coburg connection was, I think, on Victoria's mother's side, with the inheritance of sex linked conditions understood, the threat of the illness having come to Victoria was realised, so the legitimate son, His Serene Highness Ernest of Saxe-Coburg Gotha, who was known to be a hemophiliac, would have been a disastrous match as it would have condemned most of the royal children to inherit the full form of the condition.

Even with the marriage to Albert, Victoria's daughters spread the condition to other royal houses - perhaps most notably to the Russian Czar's son.

Victoria - being female, did not inherit the crown of Hanover from her uncle William, it went to another of her uncles, I think he was also called Ernest.

It is sometimes rather amusing to think of the different possibilites in British history, if there had been children, or if a boy had been born rather than a girl, or if someone had lived to inherit.