Should I confront or not?

[peaceSJ]

In April my H dropped the bomb and wanted divorce; he claimed he was unloved, unhappy and lonely for so many years. In Sept. I discovered the OW who lives in another city. They met once a month during weekend. I've been in this site for a while and got a little bit confused. Should I confront my H or not? Some said not, but some said do it sooner otherwise their emontional bonding will be deeper and deeper. I have two little kids and we still live in the same house. I don't want our kids to be hurt.
I know H and the OW will meet again soon. Should I tell my H I know it already and stop him?

You inputs and advices are really appreciated. Thank you...