If you'd like to keep your mom in your life for the long run I'd take it slow, and take it at a pace that is comfortable to you. Maybe try a few conversations and see how that goes.....
I have to agree here Richie. You're mom is reaching out to you because she loves you. No matter what our kids do we still love them. Mother/Child bond is very strong. But also you want her to know that she must respect your right as an adult to make your own choices as she had that right. As a child matures into adulthood the relationship w/mom and dad changes. Now it is an adult to adult relationship whereby each respect the other - they agree to disagree - and get on w/enjoying each other's company.
Thanks for sharing the news with us.