Is it permissible for a wife to sing songs to her husband that have sexually suggestive lyrics with the aim of deepening their relationship, knowing that this increases the arousal of both of them and may lead to overstepping boundaries?

Singing is of two types: The first is that which involves a musical instrument such as the oud, the mizmar, and the like. Listening to this is unanimously forbidden for both men and women. As for playing the duff (tambourine), it is permissible for both women and men. The second type is singing without instruments. If it comes from a woman to her husband, and the words contain no indecency and invite the spouses' desire for each other, then there is no harm in it. However, if the woman sings and dances in front of her husband to musical instruments and music, then this is not permissible.