I have mixed feelings about this commercial. Yes, I thought it was cute and moved on, but this thread has me thinking. I think there are always things that we said, "Don't tell Dad/Mom," and as kids we thought it was a big secret. Now as an adult, I am 99% sure that my parent told the other, but mentioned it was a secret. Seriously
do you really think my mom didn't mention a trip to Dairy Queen to my dad, even if it was supposed to be a big secret? I would guess that many of us share "the secret" with our spouses, but let the kids continue to think it's a secret- that's part of the fun.
I'd be more upset if my DH did something with DD that he knows I'd be very opposed to. For example (and only an example- DH would never do this), letting DD ride in the car without her seatbelt. I would be IRATE if DH allowed this and said to keep it a secret. It's dangerous, and you only need to have that one accident, that one time, and it's not a silly secret anymore, it's a life-changing event. Besides, seatbelt use is something DH and I agreed upon as a family rule, so I think that even hinting that it can not be worn is disrespectful to me, as the other half of the rule-makers in the family, and undermines some of my authority with DD (as in the "Mom might think she makes the rules but Dad has the final say" line of thought). Really, to me, the "amusement factor" of keeping things secret from the other parent depends on the situation, and whether it's a harmless activity or something that the other parent has very strong feelings about.