How kind of your husband and his sisters.
For someone who sews like a maniac (love it!!!)............. I would not do a surprise gift.
What you might choose, may be a long way from what she would really like to have. She's an experienced sewist, so will already have the knowledge as to what she wants ... and if not, will have fun in checking out all the brands, models and features, to get what she really wants.
Just be sure that you encourage her to not limit her choices ... and perhaps go for a step or two above, what she thinks she might ever need or want.
You could have fun with this, by wrapping up a toy sewing machine with a note from all who are contributing as a gift certificate for her ... treating her like Queen for a Day!!
I'm sure she will appreciate making the selection ... rather than having something delivered, that perhaps is far from what she has always dreamed of owning, and feeling as though Mom should stay mum on any disappointments she might have!
