1- Ruined Happiness

Note: In many versions of Dracula he has three wives, so what if when he married Lisa he already had a wife? However, a wife he didn't love?

He married and transformed his wife after he had become a vampire. He didn't wed her cause he loved, adored, or even wanted a family with her. The only reason was to have someone by his side, so he didn't grow lonely or mad in his castle. However, even though he didn't love her she loved and adored him.