Don't assume, not a DINK. Just saying from another perspective. Just don't force your idea and expect it'll definitely go your way, so at least won't have disappointment if your kids turn out a char siew or don't really spend their life with you. Don't need pressure them, they may more likely leave you if they putting your idealogy. You're being extremely selfish, better not have any kid.
You likely die alone either way still. Besides, what's so scary about dying? Everyone come into this world alone, and leave alone.
What's the odds of a granny cheating? Like if a non DINK, your wife can't cheat? What's the logic? Beside, if I'm gone, what makes you think I'll know or even feel anything or care? You know and confirm what comes after death? You've to be realistic in your thinking
Good for you if your preference and you're enjoying bringing up kids of your own. That may not be what the DINKs are thinking, that's why they're remained being DINK. To each their own. Again, no need to force your idealogy and preference onto other. Be more open minded and accept that not everyone thinks like you.