What do you say when someone apologises for swearing in front of you?

I once swore much worse than you did today. God convicted me of my sins and one was blaspheming and swearing. I remember the day well. I had just congratulated myself on not swearing too much on a soccer field. Then God convicted me that sin is all failure before a holy God. And each of those swearings were a sin before an absolutely holy God. I realised then that because God is absolutely holy and I am absolutely sinful I deserved absolutely to spend eternity in hell away from the holiness of God. Where could I ever find mercy! Because I had done more than swear and blaspheme and each sin separated me from Holy God. I then discovered by reading the Bible that God so loved the world that He gave His only Son to be the atoning sacrifice for my sins. Christ died for my sins. All I needed do was trust Him to be my Saviour and all is forgiven and pardoned. The blood of Jesus God's Son cleanses us from all sin. Now that is amazing grace. Your swearing doesn't offend me, but I think you need to know there is a God who has mercy and grace who provided an atoning sacrifice for all your sins and mine. You really need to do what I did and discover His mercy and grace for you too. He changed my life. I don't need to swear any more , though sometimes I do when people do stupid stuff on the roads.