彼女は買い物に出かけると、結局不相応な買い物をしてしまう。

tbd

Whenever she goes shopping, she ends up buying more than she can afford.

君はこのまま収入不相応な暮らしを続ければ金に困って身動きがとれなくなるだろう。

tbd

You'll find yourself in deep water if you continue to live beyond your means.