Sense of humor

One day, my brother sent my sister and I an email with something that he wrote, it was a fictitious conversation between our mom and dad. For this post, let's say that my parents' names are Maria and Jose, his email went something like:

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Jose: Maria, mahal ko, naalala mo pa ba yung dating panahon nung una tayong nag da date ?

Maria: oo, ang tagal na nun, malalaki na ang mga anak natin.

Jose: Buhayin natin ang nakaraan! Magkita tayo ulit doon sa dati nating tagpuan at mag date tayo.

Maria: O sige, masaya yan.

Kinabukasan...

Jose: Anong nangyari sa yo, maria ? Hintay ako nang hintay pero di ka nakarating ?

Maria: Strict ang parents ko eh.

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I sent a response to my brother "LOL" and I was really laughing out loud and was almost hysterical each time I think about my parents having this (fictitious) conversation. Funny kasi.

Then, my sister sends a response, "eto na ? nasan yung punch line ?".

Sis even calls up my brother and me (separately) to ask what was so funny. She was serious, di talaga nya na gets. I tried to explain, but I couldn't explain it clearly to her. All I could say was "e matanda na sila, di na uubra yung strict parents na excuse". She then says "e totoo namang strict ang parents ni Mommy eh".

This got me thinking... is our (my bro & I) sense of humor a bit off ? Bakit di na gets ni Achi ? In any case,... at least my brother and I get each other, even if we turn out to be weird :P

Do YOU find this funny ? or kami lang ?