Kazz, LOL @ the MIL thing. I have the same problem. Its not the smell of MIL herself but her house. I think its all the meat she cooks or something but every time we visit I feel a bit queasy until its time to go. One of my friends had the same problem (my MIL's house not hers). Lucky for her she's had her baby so she's back to normal.
Also I'm not fond of the smell of raw mushrooms and in the first trimester I couldn't cope with the smell of eggs. I didn't even like to look at egg cartons in the shop.
On the other hand I'm loving the smell of coffee, yummmm and DH smells really nice right now (except morning breath of course) and also boiled Jasmine rice.