My wife having extra marital affairs and I caught her red hand

My wife having extra marital affairs and I caught her red hand thrice. Now she is at home with me but now I don't have any interest to go ahead in this relationship. My wife is divorcee when I got married to her. After that she is in relationship with me for 2 years and then we decided to get married. After we having baby and look after the all responsibility of houses may be I not actively commuted to her but once in week we have good relations. But after that I caught her red handed with her Boy Friend. On First time I think to give her chance to correct her mistake but after that I found that she again spending time with someone else and that to with two different men's. But now my family is very scared due to all this legal outcomes. And we ask her to give her confession on notaries legal paper stating that she was having extra Maritial affairs with some 2 people other than me. Now I need divorce from her. To secure my child future and I don't want to leave with this kind of personality. Please suggest what will be the best remedies...