I lied to my wife on several occasions how can i gain trust again?

i have never cheated on my wife at all i love her with all my heart just want to get that out of the way but i have lied to her about money,drugs ,previous marriage if it was a marriage,to me it was not that is not the case, i have a son with ex and feel weird talking to him around her so when she found out i was talking to him she flipped out cause i did not tell her i feel that she thinks i will go back to her but am not i hate my ex also ex has a daughter that might be mine i don't know if she is .i know she loves me because she has been by my side all these years but sometimes i get mad with all the accusations and questions. what can i do to make it better? i know she wants to trust me.