Please help my ponytail plant (elephant foot)

[smh_shz]

It is summer in here and the weather condition in our city is hot and the apartment condition for my plant is as follow :
1. Indoor with medium humidity
2. Once or twice a week watering.
3. 30 to 45 degrees centigrade
4. Not straight sun light ( back of window )
The problem is that at first it shape was all round but from past 10 days it's newly grown leaves started uncurving ( falling downward as you see in attached image).
Please help me .... What is the problem ?

[purpleinopp]

Looks like it needs more light.

[Sweyn]

You could also try keeping it in a porous, clay pot.

[imafan26]

Definitely could use more light.

[smh_shz]

Thanks everyone. I will close it to the window and see what happens.