I am having an affair and got engaged to my fiance' last night. Should I leave my wife now or wait until Christmas is over?

We have 3 kids and they are all 11 and under so it will upset them. I don't care much as I am in love with my fiance' but unsure if I should wreck their Christmas. I will be moving in with the fiance' as soon as my wife and I split and would love to be with her for Christmas. I do have some love for my... show more We have 3 kids and they are all 11 and under so it will upset them. I don't care much as I am in love with my fiance' but unsure if I should wreck their Christmas. I will be moving in with the fiance' as soon as my wife and I split and would love to be with her for Christmas. I do have some love for my kids though but suspect I won't be seeing them much after the divorce from the wife, soon to be ex-wife.
Update: I am not an Internet troll, this is a valid question. Since asking my wife found out and is being a you know what so I am moving out. It's my life, not theirs or you alls. Thanks for the answers though.
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