Mike, this is just an idea...if today was your wifes day with the kids and she either forgot or caved in to bf's wishes, why don't you hold her to it??
If you have agreed upon visitation, she should uphold that whether or not bf wants kids with them or not...she should be a mother first.
Of course it is good for you that you have them...you seem to do great things, fun things!!
Maybe putting your foot down and holding her to visitation times will help bf and her realize faster that their "fantasy" is starting to fizzle.
I used to have those kinds of dreams...would throw me off for the entire day! Hopefully you are feeling better by now.