Regular poster but NC in case IABU and mean and make you all think I’m horrible 
DP and I live with MIL (it’s neither her house nor ours) and I adore her. However, she’s one for incessant small talk! I was sitting in the garden earlier happily engrossed in my book when she came and sat next to me and started wittering away about something or other.
I’m usually more than happy to chit chat with her but sometimes I’d like a little bit of peace and quiet, hence why I took myself out to the garden with my book. I had a stupidly busy weekend at work and just wanted to relax and enjoy the evening sunshine today.
I guess I’m feeling a bit guilty now because she eventually sloped back into the house to watch TV. She hasn’t many friends so she’s quite lonely, although I do make an effort to spoil her when I can, but today I just wanted to be by myself.
WIBU to not engage with her? I feel horrible 
Also any tips on gently telling her I don’t want company for future reference?!