If you give it to your nephew, you can cancel or go back on your word before the transfer. But after the transfer, you can't go back on your word. So I suggest you be cautious. After all, your behavior will not only make your son sad, but also fail to protect your property interests. When the real estate center specifically transfers ownership, the real estate center will review the marital status of the house registrant and you, and will not ask your son to sign.
legal ground
civil law
Article 657 A gift contract is a contract in which the donor gives his property to the donee free of charge and the donee expresses his acceptance of the gift.
Article 658 The donor may revoke the gift before the right to donate the property is transferred.
The provisions of the preceding paragraph shall not apply to notarized gift contracts or gift contracts with public welfare nature and moral obligations such as disaster relief, poverty alleviation and disability assistance, which are irrevocable according to law.
Article 659 If the donated property needs to go through registration or other formalities according to law, it shall go through the relevant formalities.
Article 660 If the donor fails to deliver the donated property in a notarized gift contract or a gift contract with public welfare nature such as disaster relief, poverty alleviation and disability assistance and an irrevocable moral obligation according to law, the donee may request delivery.
If the donated property that should be delivered in accordance with the provisions of the preceding paragraph is damaged or lost due to the intentional or gross negligence of the donor, the donor shall be liable for compensation.
Article 66 1 Gifts may be accompanied by obligations.
If the gift is accompanied by obligations, the donee shall perform the obligations as agreed.
Article 662 Where the donated property is defective, the donor shall not be liable. If the donated property is defective, the donor shall bear the same responsibilities as the seller within the scope of obligations.
If the donor intentionally fails to inform of the defects or fails to guarantee that there are no defects, thus causing losses to the donee, he shall be liable for compensation.