I want to make this become reality someday

My wife and I are married for long and she is a shy woman and doesn’t like much attention. But I have noticed subtle things about her being proactive when I ask her a few things.
She definitely likes being loved and she is happy with whatever comes along. But I really think that we need to get into the lifestyle someday very soon.
Please help me with advice or suggestions on how to let things get into place.