In my experience, this is 100% trying to get you to do more chores than you agreed to split with her. Graciously accept the compliment, and if she needs help with her chores obviously help her. But I wouldn’t go out of your way to do more chores than you agreed to. Otherwise you will eventually find that the agreed split is no longer a split at all, and then resentment will build up. Resentment of course being a silent relationship killer.