One months after birth, wife is constantly passive aggressive and mean. Is this a phase?

I love my wife very much. We’ve been together for 16 years and married for 11. We just had a beautiful baby boy a month ago.It has been a tough month for sure, but the last two weeks have turned my normally wonderful wife into someone verbally destructive. Most arguments revolve around money. We do very well for ourselves and money has never been a source of frustration between us but lately she has been spending like crazy. She wants the best everything for him. Everything. This has led to her buying hundreds of dollars in meaningless products which she has to often turn around and return because she realizes she can’t use it. She approaches me several times a day telling me we now need x, y, and z.I know she wants what is best for our son, and I know that the first month is hard. I’ve been trying to cut her a break but honestly she’s more difficult than the newborn.Have others experienced this? Does it end? How did you cope? via /r/Parenting http://bit.ly/2Y8mUrk