Hello Fancyface - I think I may have it. Okay, yo, then knit to the ssk from 2 rows below (it will be a left-slanting stitch), then ssk. Follow up from the ssk from two rows below, this stitch will be the first stitch that you will be using in your ssk (slip, slip, knit stitch). I hope this makes sense, if not write back.
I'm not familiar with the book Dahlia Blanket or the pattern, but this is how I understand it.