My MIL was the same way. I do like my MIL very much but this question was getting soooo old. She mostly would ask my husband.
About 6 months ago, after not asking for awhile, she casually asked my husband how DS was sleeping. My husband nonchalantly said "oh he sleeps great, still sleeps with Liz." At the time I actually would have preferred that he just not discuss it, but I think the shock of that revelation (co-sleeping at 18 months) was so great that after that, she just stopped asking.
She's always so impressed with the way he goes down for naps at her house, so hopefully realizes that the co-sleeping has not messed him up in the least.
If your MIL is not rude about it, I think I would just say "oh yeah, the baby sleeps well. Isn't this nice weather? Did you hear about that news story?" Etc.
About 6 months ago, after not asking for awhile, she casually asked my husband how DS was sleeping. My husband nonchalantly said "oh he sleeps great, still sleeps with Liz." At the time I actually would have preferred that he just not discuss it, but I think the shock of that revelation (co-sleeping at 18 months) was so great that after that, she just stopped asking.
She's always so impressed with the way he goes down for naps at her house, so hopefully realizes that the co-sleeping has not messed him up in the least.

If your MIL is not rude about it, I think I would just say "oh yeah, the baby sleeps well. Isn't this nice weather? Did you hear about that news story?" Etc.










Gotta love well meaning mothers and MIL.

So only select people know exactly how long I BF, that we bedshare up to somewhere between 12-18ish months, that 2 of my children are entirely unvaccinated and the oldest is only partially, that we don't buy jars of baby food (yes, even THAT has been found 'strange' on occasion), that NOBODY else feeds my infants. People find out I use cloth if they see it, but I only rave the good. 