Not without lying to the court.
I'm assuming here you mean "ex-wife" and that the kids were born during your marriage, or that paternity and custody rights have been legally established. If you haven't legally established paternity, there's no time like the present.
Note, if you haven't kept her appraised of your address for service she could potentially proceed based upon substituted service. That's legally adequate notice, but it may not involve your actually receiving notice.

