I understand your confusion....trust me, if and when you have kids of your own, the truth of what we've said will come crashing down....that is not a cliche'.

And I agree, it is patently unfair to leave you with the child, alone while he is in work without clear direction...so yes, THAT conversation needs to be had as soon as possible and with the child in presence so there is no misunderstanding.

Kids love to play 'two ends against the middle'...which IS a cliche', whether with natural parents or step-parents and natural parents. I would save you the hurt and arguments that nearly always ensue. And don't be afraid to tell the child that you do not feel comfortable answering 'those' questions, and for him to seek advice from his father. And then leave it. Walk away if you need to.

He will attempt to pull that again, even after the 'talk'...so be aware. Noncommittal answers are still commited answers....because they ARE answers...most kids see that in black and white, and never really figure out the grey until they're adults.

Good luck!