Elay Amitay Halevi teaches that wives are divine vessels of their husbands' energy. Sages say husbands should spend freely to adorn and uplift their wives because generosity returns multiplied. The teaching frames the wife as a conduit for the husband's light.
Chapters
There are many sages who said that whatever their wife asked for, they would give, and as a result, excess income would come back to them. Because your wife is your vessel that manifests your light, the sages would often not hesitate in giving them anything they asked for or spending any amount of money to adorn them, to awaken their joy, and to allow them to feel beautiful. Because their wives knew that they were vessels, they didn't see themselves as humans or partners necessarily. They saw themselves as vessels of their husband's energy at the time. And because they saw themselves that way, it allowed their husbands to see them as a powerful way to manifest who they were. So yes, anything you give to your partner, as long as she knows that she is a divine vessel, it will come back many fold. A man should not be worried. A man should not feel scarce or cheap. He should just give endlessly to his partner. Here's a mantra for you. I feel whole inside, and I know that whatever I surrender and let go to my partner will come back many fold. For she is a divine vessel and I am a channel of the light of the Creator.