“I think the biggest problem is that someone would look on line for the answer to a halachic shaila.”
meh
not a problem and not a halachic shailah
ywnjudy
“Well, speak of minhag, as a child we ate gebrok”
sounds like it isnt your family minhag. ITs nice that your family changed to accommodate a sibling in law, but that in no way obligates you.
Of course if said sibling will be joining with you , you should check with them (though odds are if they keep gebrokts they wouldn’t put any dip, certainly none containing water on matzah)