Quick background - My MIL has reduced mobility due to various health issues. This means she finds it difficult to stand from the sofa or walk upstairs, for instance.
Our DS is 3 months. MIL has got the impression that she would be caring for him one day a week when I return to work. It is possible that DH said this to her early on in my pregnancy when he was excited but it is not something we seriously considered due to her health issues (FIL also unwell).
A few weeks ago while at PIL's house, SIL asked what was happening to DS when I returned to work. I said, without thinking, that my family were going to care for him. MIL became upset (apparently crying after we left). This is understandable and wasn't my intention to upset her.
Anyway, she has ignored us ever since. We have tried to contact her on numerous occasions, phone, text, have written a letter, but still no reply.
So, AIBU to not allow PIL to care for DS for long period of time while I'm at work (will be about 10 hours)? Any ideas on how we can resolve this? DH agrees with me by the way and ask asked me to post on here for ideas!