My sister’s gigantic aloe is tilting, how can I help it?

My sister’s gigantic aloe plant that lives in our shower has started tilting, what should I do to fix it? She takes very good care of it so I’m not sure what is going wrong. The pot has sufficient drainage (that’s why it lives in the shower), and I’m pretty sure she waters it once a week with a cup of water. The shower is right under a sunlight so it has constant access to natural sun. I’d say we’ve had it for 2 now? Maybe just under 2 and it only just started doing this.

My sister’s gigantic aloe plant that lives in our shower has started tilting, what should I do to fix it? She takes very good care of it so I’m not sure what is going wrong. The pot has sufficient drainage (that’s why it lives in the shower), and I’m pretty sure she waters it once a week with a cup of water. The shower is right under a sunlight so it has constant access to natural sun. I’d say we’ve had it for 2 now? Maybe just under 2 and it only just started doing this.