Stay in a caravan park. This will ruin your relationship with them. I speak from experience.....

Cook your own meals

OMG so sorry! Posting from my phone and it's lagging really bad, didn't even notice the typos!!!!

Wow. How ungrateful.

I think you need to be a little more grateful. Not everyone has the option of moving in with family

I feel for you. But it's 2 months! At least you have an end date. I was there for a year due to various reasons. My FIL new wife did not like me as I attended to my newborn rather than to her needs. I offered to make dinners, but she insisted on making all the meals, then complained to visitors I didn't offer help. We lived downstairs and I would clean our messes etc. But she'd complain I was a pig and sat around doing nothing.
I don't know if your MIL is this awful, but venturing into their territory can be weird. But 2 months. That's all! I barely survived and nearly divorced my husband it got so bad. But I think you'll be okay. Wish you all the best!

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Get out of the house as much as possible!

I’ve done it three times for 18 months at a time! Offer to cook a few nights a week so that you get some regular meals you like. Do your own laundry. Go out on the weekends with your kids so that your family and the in-laws aren’t on top of each other. But, also go out with them sometimes so that you can have some “fun time” as a big group. It will break up the tension that might be building. Share the housework so the in-laws don’t feel like they’re expected to take care of you all. Go to your room and read a book for some time out. The third time we stayed with them was the hardest because my father in law was starting to become old and grumpy. But we made it., and the kids have a great bond with their grandparents.

Suggesting you cook a few nights a week is a great idea. Mostly to show your appreciation towards you MIL. She might say no and you will, as a guest in her home have to be ok with that. Maybe plan some family days where you can go out and have a taco or a rice dinner, just you the kids and hubby. I would say your ILs would like the space too as it might be a stressful time for her also having extra people in the house.

Be super tidy super considerate and go out for tea on a regular night to give them a break. Offer one night where you cook and suck it up the rest.

I suggest you planning it better next time so you don’t have to live with your in-laws.
For now, suck it up, princess. Let her cook all dinners, help as much as you can with housework and remember it is only temporary. ;-)