Those feelings are normal....I can relate totally to them....I think at some point in any marriage w/kids the woman can relate to this....and the man, lol
I would say the reason he is "all hands on" is because he is trying to show you that YOU are the object of his affections now...he is being reassurring to you in a way that a man feels reassured....with physical actions...
I think sometimes the remorseful H also will be a bit MORE affectionate so as to "block" out any of the memories he is trying to forget....including the guilt...being able to be with you intimately reassures him that he hasn't lost you, that he can have you, and in time things will be ok...
Like the others said though....don't be suprised when things get back to "normal"...that is when it will be up to you to fan the flames for a bit...initiate...this is where YOUR work on the M comes in....you can't let the fire go out like before...
And please please please....don't use sexas punishment and reward....that is not healthy for you or him....or your children...
