It was so hard to find some real and reasonable information about this song but it was worthwhile. So I have read that Stevie wrote this song for her step-son Matthiew and her husband Kim Anderson. And she wrote it when she'd realized that there is no sense to carry on this marriage (as she said in many Interviews - she was well-minded wanting to become Matthiew's mother but in spite of it marrying Kim was a big mistake). But as it is stated in the song: she will always be in their dreams and she will always be in their lives in some way.
It was so hard to find some real and reasonable information about this song but it was worthwhile. So I have read that Stevie wrote this song for her step-son Matthiew and her husband Kim Anderson. And she wrote it when she'd realized that there is no sense to carry on this marriage (as she said in many Interviews - she was well-minded wanting to become Matthiew's mother but in spite of it marrying Kim was a big mistake). But as it is stated in the song: she will always be in their dreams and she will always be in their lives in some way.
https://blog.sevenponds.com/expressive-music/in-your-dreams-by-stevie-nicks
[Edit: Grammar]