Questions: Relationships

My girlfriend and I have been together a little less than 2 years, and she moved in with me about 4 months ago.

At HER suggestion, she cooks dinner and I clean up, because I work further away, work longer hours, so get home later. This way, we can have dinner when I get home, and she can relax while I clean up.

About a month ago, she changed jobs to a mostly work from home position; she just has to go into the office one morning a week.

The last few days, I've noticed a SUBSTANTIAL increase in the washing up to be done, well over twice as much as normal.

I mentioned this to her and she was all "Oh yeah, I've started making myself some elaborate breakfasts and lunches, it's great, so tasty and I feel healthier".

I told her she needs to start cleaning up after herself for breakfast and lunch, and she immediately fired up with "THAT WAS NOT WHAT WE AGRED! I COOK, YOU CLEAN!"

I told her I agreed to clean up the dinner dishes, as I was eating dinner, I'm not cleaning up after her breakfast and lunch.

As for the rest of the housework, it's split evenly, and I also do all the outdoor work (I enjoy it).

She's gotten really frosty since this, her defence is still "you agreed to clean up, it doesn't take much longer" (not true, it's taking a LOT longer because the dishes have sat there all day and the food is hardened), and we don't have space for a dishwasher.

Who is in the right?