DH and I along with 2 very close friends were round M&FIL's house last night for dinner. The subject of children came up (as it does quite often) and we were saying that we want to wait to TTC for at least another 3 years as we need to move first, want a nice holiday and get finances up to scratch.
MIL quite matter of factly said that 3/4 years would be perfect for her, as she is looking to retire about then, so she would be able to have said grandchild all week and I could go back to work full time. I kind of brushed the comment off as excitement on her part and thought it was quite sweet.
Conversation moves forward a bit, talking about friends DD and the baby she is expecting, MIL is giving usual advice etc. but kept popping in comments such as "oh well when jelly has her baby, I wont be doing XY&Z, I'll be doing this" and so forth.
Again I brushed this off (a bottle of wine helped...) but then she went on to say that if we are looking at 3/4 years then they better start looking at bigger houses??? 
Dh asked why, and MIL said that their second bedroom in thier current house (medium sized 2 bed house)is no where near big enough to fit a cot and changing table, and they would ideally like to have a play room...
FIL looked a bit stunned at the moving comment. I didn't say anything at dinner, but on the drive home, DH asked if I thought her comments were a bit strange? I said that part of it was excitement but she seems to be thinking about it too much... DH wants to bring it up with her when we are round there next, I would rather cross that bridge when we come to it, (hopefully before she gets the house on the market!).
What would be the best way to approach this? She is the kindest person I know, but has a habit of being a bit to intense with things, and inadvertently (sp) people end up getting the wrong end of the stick.
Sorry for the essay...