Or do you not know, brothers and sisters ¹  (for I am speaking to those who know the law), that the law is lord over a person ²  as long as he lives?

For a married woman is bound by law to her husband as long as he lives, but if her ¹  husband dies, she is released from the law of the marriage. ² 

So then, ¹  if she is joined to another man while her husband is alive, she will be called an adulteress. But if her ²  husband dies, she is free from that law, and if she is joined to another man, she is not an adulteress.