What's the antecedent of the play A Doll's House? I have read this play twice and I cannot find it.

He playfully rebukes her for spending so much money on Christmas gifts, calling her his "little squirrel". He teases her about how she spent weeks making gifts and ornaments by hand last year because money was scarce. This year Torvald is due a promotion at the bank where he works, so Nora feels that they can let themselves go a little.