If the shoe fits...

I noticed a pair of unfamiliar grandma-like sandals in our genkan-entryway and thought maybe there was someone here. So I asked my mom, but she said no and why do I ask. "Because there are a pair of old granny shoes in the genkan that I've never seen before."
"Oh, those are mine," she tells me.
"Those granny shoes?" I ask.
"Yes, I thought I'd start wearing them from now...," she responds.
I thought about it for a minute.
"Because you're getting old or because it's getting warm?"
She laughed so I thought she was going to say, "Both" but she didn't say anything at all. Sometimes her actions are super CB*

* Yay! Footnote number 2
cho bimyo means 'very hard to tell' - I recently read an article about this kind of Japanese that they are calling KY-style Japanese. I want to bring it to the US because if it's possible to make something that already is kind of meaningless to me even more meaningless while somehow retaining some significance, then I'LL DO IT.