Perhaps you have heard of Billy and Ruth Bell Graham?
She was Presbyterian all her life, did not join the Baptist church Billy pastored near Wheaton, had her babies sprinkled, etc.
From Ruth and Billy Graham: The Legacy of a Couple:
"In Montreat, Ruth and her five children regularly attended the local Presbyterian church. Well-meaning friends of Billy's wanted to convert Ruth to the Baptist faith, but anyone familiar with Ruth's character was aware that this was an impossible undertaking. . . .Ruth's opinion was that, if anything, it was Billy who should switch churches. . . .When Billy was at home on a Sunday, he and the family attended the local Presbyterian church."
These are rare examples and not the norm of the millions of christian families.