さっき、なかなか起きなかったのも、折檻して欲しかったからでしょう？

、、？

The reason you wouldn't wake up earlier — it's because you wanted me to punish you, right?

Literal

Just-now, wouldn't-easily wake-up [nominalizer-のも], punish [want--てほしい] [because-だった] [right-でしょう]?

なかなか + negative gives 'didn't easily / took forever to' — distinct from the positive-only 'quite / pretty.' 折檻 'stern punishment / severe scolding,' often corporal, is old-fashioned vocabulary for parental or disciplinarian punishment. ~て欲しかったから 'because (you) wanted X done' uses the past form of the desiderative for others. The trailing でしょう? invites confirmation of the speaker's accusatory interpretation.