Hello,
Wow even with the 36 degrees they still look good, not heat stressed or ugly by any means.
As for fattening up, i usually notice the most bulking on my plants in the last 3 weeks of flowering so I think there's still lots to come. And for this strain i think its not uncommon to actually have a flowering time anywhere from 7-11 weeks, every plant and environment will give you different results. By your white pistils I'd say its definitely got at least another 3+ weeks to plump up.
Happy harvesting.