What is the Shar'i ruling on a husband saying to his wife about their son, "Here, take your son" and "He is not my son"?

The husband's statement should be interpreted with good intentions and the presumption of safety, as he may desire perfect tenderness and affection from the mother. However, his statement is outwardly a lie, and if he intends to joke, he should avoid doing so with falsehood, for the Prophet, peace and blessings be upon him, said: "I guarantee a house in the middle of Paradise for one who abandles lying even if he is joking."