We sin in this way and others (drink alcohol, etc) on a fairly regular basis. This is another of my points! Surely you cant just pick and choose which and when the 'rules' apply?!![]()
Of course you can. Religion is irrational, so rational concepts such as consistency are irrelevant. It's always possible to rationalise any inconsistency away if someone pushes you on it, or to just ignore them. Any decent person has to do that with Christianity because there's some truly foul stuff in it. Every Christian I have ever met treats their religion as pick 'n' mix, even the really devout ones.
Bear in mind that your hypothetical children would be unlikely to make the same pick 'n' mix as your girlfriend. It's likely that they will be more radical because children are easier to condition than adults and lack the experience and maturity to temper it. Even if the conditioning doesn't go very far, how would they deal with, for example, being taught to believe that you are bad and wrong and will be tortured for eternity? Inner conflict there.