I think you are asking if anything inappropriate is going on between the two. I would ask your son. If so or if you are suspicious, report this person to the police. If not I see no legal case here.
Mr. Pittman states the correct response.
The author provides the preceding information as a service to the public. Author's response, as stated above, should not be considered legal advice. An initial attorney-client conference, based upon review of all relevant facts/documents, will be necessary to provide legal advice upon which the client should then rely.
Not really a legal question presented- more of a common sense answer every parent should immediately know the answer to. The fact that you gave birth but apparently lack the judgment to answer this on your own is astounding. The answer should be clear to you- I cringe for the future.