Anthony is having the expensive bling engraved with their initials baby - one for each ear.
A source said: "It is no secret that J-Lo has expensive taste, Marc would therefore have to spend a serious amount to show how he feels it."
Meanwhile, the couple is on the hunt for a nurse to move in and help keep the children under control.
The source said: "They want someone they can trust to give the twins a good sense of the land and some good discipline when they are not around."
