When Lucky eventually found out about it, he left her.
However, Elizabeth became pregnant and didn’t know who the father was.
Liz then became romantically entangled with A.J.

But when Nik got injured and she then helpedhim, A.J.
became jealous, so she and Nikolas kissed.
Everyone, including Elizabeth and his son Spencer Cassadine (Nicholas Chavez), was furious with him.

But she survived and was in hiding due to her many crimes.
She turned up pregnant and assaulted Liz on the docks.
Eventually, Elizabeth traced her back to Wyndemere and found Nikolas holding Esme prisoner.

Esme eventually escaped, and took another header off of the parapet, later resurfacing with amnesia.
But it’s only a matter of time before Nik returns and tries to mend fences with Liz.