Justin,
Frankly, if a family member asks: "Why can't you go to your
"old church" so that all the family could attend. I think your
response could be: "We could have the baby baptized there,
but we no longer go there. That is not where we attend, and
it is important to us to go to our current Church, that is where
our priest (spiritual father)is , our church family is , and we
more than welcome all of you to come and see the baptism
there. It would bring much joy to us if all of you could make
an attempt to attend." (And leave it at that) If they press
the issue, I would say: "I don't know what more explanation
is needed? I told you the reasons why, and if you chose
not to attend, we understand, but would more than welcome
you to attend."
I don't think it is necessary to go into the reasons about why
you no longer attend the "old church". They wouldn't
understand anyway.
With humble bow,
Rd. Chrysostomos