My MIL is a lovely lady, very kind and would do anything for you. She keeps asking to have our two DS's (both under 2) overnight which I'm reluctant to do and here's why.
She smokes in the house, including upstairs. She's morbidly obese, has terrible eyesight and has headaches every day. She also has a terrile diet and eats only take away food. When my eldest DS visits for the afternoon I send him with food as she doesn't have any decent food to give to him. My DP has tried and tried to talk to her about her poor lifestyle but she's in denial and we appreciate you can't change anybody.
I want my children to have a good relationship with her and spend lots of tine with her but it worries me that she won't be able to look after them properly. I so wish I felt differently as she is only the only family who could possibly have them overnight and me and DP haven't had a night away since DS1 was born nearly 3yrs ago.
Am I being unreasonable?? BTW she's 46 years old so hardly a geriatric!