I have two sons. I’ll project them forward and speak to you as I would speak to them.
First off, all I am really concerned about is that your repentance is real and you have been to confession to be reconciled with God. I want you to return to God and to the path of eternal life and happiness, that is the main thing. You do not need to “confess” to me, and I won’t have my feelings hurt if I find out that you kept this private or wanted to shield me from the knowledge of what you have done.
Having said that, just because you are a man does not mean that your family is not there to support you, whether someone has done something bad to you or you have done something bad yourself. Of course you can confide in me if it will help you heal from this terrible set of decisions. This would upset me like finding that you were in an accident that could’ve gotten you killed would upset me. On one hand, of course I would be upset that you had been so foolish, but mostly I would be grateful and relieved that you were out of danger and realized your mistake. I would be proud and happy that you had decided it was time to repent and amend your life, that you weren’t making excuses for yourself, but were stepping up and taking responsibility. That’s me.
If you were my son and you had committed a crime, it would be enough for you to say, “Mom, I need to consult with an attorney. That’s all I can tell you. Can you help me to find one?” I would help you to do that, and I would wait with my questions until the time was right, if you asked me to. My own sons are only 13, and they know this much: if you need an attorney, don’t let shame keep you from getting one.
Don’t think that you will keep her out of your troubles by failing to confide in her. You could instead be putting her in legal danger. If you need an attorney, consult with who you need to, but find one, and find the best one you can afford.
Overall, though, I think that sorting this out is a good job for you to do with the help of your pastor. Get in touch with him as soon as you can, and let him know that it is urgent. Tell him you need to confide in him as your confessor, and when you have him alone, lay it all out to him. Like your attorney, he enjoys a privilege before the law, and can give you counsel without being brought in as a witness against you and without legally becoming an accessory to your crime. But do make sure before you start to “lay it out” that he agrees that he will be hearing what you have to say in that capacity. You don’t want to put him in a moral conundrum, too! He can help you decide how to handle this with the mother and family you actually have, instead of what you’d have if one of us were your mom.
Don’t go through this alone. That is not how the Body of Christ works. The Body is set up for healing when there is an injury, for repentance when there is an offense. Live according to that.