I disagree, slightly, with the other answer posted. If you have not filed for divorce, she can relocate and the issue then becomes, can you get an order requiring her to come back. The criminal kidnapping law cited above requires "malicious intent" which is difficult to prove and requires the State Attorney to deem it appropriate to get involved. The family law "relocation" statute DOES NOT preclude anyone from moving if there is not already a Court Order regarding the custody of...
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Your rights should be defined by your settlement agreement/Final Judgment. So that is the first place you should look. If your ex-wife is not complying, you can file a motion to enforce. As part of the motion, you could have rights to discovery (potentially including rights to inspect her home). If you had an attorney in your divorce, you should contact him or her to assist you in resolving this issue.