Still on the first chapter

[Enigma]

Hi everyone. Need some advice please. WW texted this evening ( again haven't seen this much texting from her for a while ) saying she forgot to tell me she has a doctors appointment this Thurs. usually Monday's and Wednesday's are my days with S2 and Tues and Thurs are her days. Well we set that up because last summer ( after BD ) I joined a martial arts class and I go every Tues and Thurs ( big GAL for me!!). She asked if it is okay if I take S2 that day. She heavily apologized for late notice. And that she could reshcedhule worse case. She asked if I still have my martial arts.

Should I be nice and take S2 for her ( extra time with him albeit few hours after school ) or let her nicely know I do have martial arts class and unfortunately can't take him? I'm thinking of the later but unsure if appropriate choice. I love martial arts plus she said worse case she could reschedule. And only told me recently.

Any advice is appreciated!