I would never dream of trying to get a daughter or DIL to sew. If they showed any interest, however, I'd encourage it to the max, without being manipulative. It's the kind of thing that if a person isn't interested on their own, you just can't make that happen. She sees your stuff, knows you love it, and still isn't interested all that much. Just wait til she initiates something on her own, which may never happen.
My daughter has finally shown some interest in sewing, after seeing all the stuff in my Etsy shop! The business end of it appealed to her-- that she might be able to sell a few things and augment her income. I bought her a featherweight for Christmas, and sent her a box of cool fabrics and some books, but I think that's as far as it went. I'm not going to bug her. When it's time, she may sew. Or not...