My sister just gleefully confessed to me that she is having an affair with her boss.She has been bored in her marriage since her husband started being a volunteer fire fighter and been away from home more often.She isn't using protection because it "doesn't matter" if she gets pregnant or not because her husband will be excited about a baby.He has wanted to be a dad since day one and they have been trying for about four years.
I don't always have a say in the choices the character makes. And writers will initially service a plot before they stop to think, 'Would the Meredith Grey that [Ellen] built - would she make that choice?"