youdontknowme
... Including a ton of first-hand insider knowledge: Not just on comfort / sustainability. But also what tricks the primal parts of the brain use to cheat, bypass device(s) - and what could be done to counter it and harden chastity.
Having statistically more similar CNS and "intimate anatomy" (because biologically related) is probably a bonus in that matter. I wouldn't rely too much on it, though...
Besides it might be the controlling, dominant, (over-?)concerned (and maybe just slightly sadistic π ) side of me, that likes to see Jenna and her family spread the glad tidings of chastity further.
(And if someone reads a touch sarcasm from my last sentence, let me emphasize: Only a tiny hint of. I mean it: Your job to make it glad tidings! Whoever reads this: Please safe, sane, consensual, ...)