Im not a collector of non-military awards nor an expert on Mothers Crosses but, they LOOK OK to me. I like the looks of the enamel as well as the date and signature fascimilie on the back sides. Most of the fakes of these crosses I have seen, have crappy enameling done to them, the blue color is almost never consistant and most of those fakes don't even have the date/Hitler signature on the backsides. One or more were posted here on the sight somewhere a few months ago. If I can locate it? ill lry you know where to look for it. Bigfun was the Gent who posted them.
These aren't that commonly faked, and yours have good ribbons, detail and enameling so I'm pretty sure that they're good.