Plus I reinforced to them that mommy and daddy both still love them and always will. (We both tell them that every day.)
LG, I agree with this approach that both mommy and daddy love the kids.
In my sitch neither of us has told the kids that one or the other of us has fallen out of love. Just think that would be confusing for our kids and potentially turn them against one parent. Not only have we told the kids we both love them but also have reassured them that what is going on with mom and dad has nothing to do with them. Just things that mom and dad need to work on.
I just think telling the kids the "truth" has the potential to damage the relationship with one or both of the parents. If things don't work out you are looking at several years of shared parenting and the last thing I would want is my kids being reluctant to stay with mom because of something I said. I know for me I feel more at ease when kids are with mom because I know they are happy to be with her.