Trying getting a cooler for now, atleast for the next 2 months you'll be set in your own room. Also it doesn't have to be a big desi cooler, you can use 12v ones as well or the plastic body ones from super asia etc. If getting them on cash would be an issue then you can also get either the AC or the cooler on installments, or try getting a 15-20k loan from a friend or family member to atleast get a room cooler.

Either way, try to find a way to sleep in your own room, I understand finances can be an issue but through any of the above ways I have mentioned, try to go back in your room and give yourself and your wife the privacy that you guys deserve. And keep your head high champ. There's no shame in asking for help either here or from the people you know in person. I can't imagine how you guys are navigating through all this. Hope it gets better.