Spending on your wife

Assalaamualaykum Dear Mufti

Islaam teaches us the best Dinaar spent is the one spent on your wife’s needs.

1) Is buying an Abaya, clothing, shoes, etc fall into the category of needs or desire? Bearing in mind that she does have more of these items.

2) If she has a few pairs, not a lot, does this mean Ishraaf?