Avery called Mike and gave him that reminder because she knew that Elliot would try and gain custody of Ivy if he caught wind of what was happening.

She had not seen Robert for three years, and she did not even know if she would be able to meet him when she returns to Aryadelle.

Letting him have custody of Ivy was the last thing she wanted because she feared it might be difficult for her to see Ivy again in the future.

Ivy might well be dead, but it was better to have a little hope than to immediately assume that the child was dead.

Mike knew what she was thinking.

The reason she and Elliot had a divorce was because of Ivy.

If she had known since then that Ivy was their child, it might not have set off the domino effect that led to the collapse of everything. It no longer mattered that she found out the truth about Ivy being her child because her relationship with Elliot had long since broken down.

After the call ended, Mike went to the bathroom to wash his face with cold water.