Take it very, very, very slow!
If there is fear in your heart regarding her response, then may I recommend that you work at improving your current relationship? This is not a judgement or condemnation, just speaking from personal experience.
God has not given us a spirit of fear, but of love, power and a sound mind. If we are experiencing fear in a given situation, especially as it relates to a biblical truth, then fear should serve as a warning light that something is out of balance.
Prayer makes a big difference. You may be surprised that after prayer, one day, just 'out of the blue', she may bring the topic up herself. It has happened more than once to people here on this very forum.
In the meantime, ask God to show you how you can be the love of God manifest in your spouse's life.
Blessings to you,
Doc