Hi Ember; You change tense a bit here. Is this a current situation or a past situation? You say you married a woman and you "had" 5 children. This indicates that this married occurred in the past. But then you say "God bless us" as if he is blessing you now.
I married a widow with six children and I had five children with my late wife. God blessed us. OR
I married a widow with six children and I have five children with my late wife. God bless us.
(with... you produced the children together).
I hope this helps,