As someone working on getting rid of a cofounder like yourself, where I did all the work and they sat on the sidelines until they saw a product and then decided to reach out to get his share, this shows that you aren't as invested even though you are a cofounder. There's a reason why the "co" is there, because both people are working on founding not one person waiting for the other to do all the work so they can just throw an idea into the bucket every now and then so that they can get a piece of the end result.