Mom’s struggling with chemo and wants to delay but its only just begun

[u/GODZILLAateyou]

For some backstory, My mom was diagnosed with ovarian cancer 3a this summer which has a 50% survival rate. Shes getting chemo through IV and IP which i be heard from others can be quite rough. She’s only finished her 2nd IV round and 1st IP round.
Her first round she was doing great but this round has been a lot harder on her, feeling drained and neuropathy at night. Because of this she wants to push back her next treatment!
I don’t know maybe i need someone who’s been through it to give me some perspective because that’s crazy to me. I’ve read that it can worsen prognosis if treatments keep getting delayed. I’m sure her symptoms will only get worse with more rounds. she’s always been one to give up when things got difficult and i also feel like she’s been in denial about how serious this is. So far i have been trying to not correct her when she says naive things about this process that are so out of touch to preserve her positive attitude but is it time for a reality check? Or do i need to be more compassionate, is it reasonable to delay for these reasons?