Even though I deeply love my wife, seeing her face contorted in repeated ecstasy from my grandfather's insatiable thrusts strangely makes my penis hard again. Despite being weak to sex, just watching her like this arouses me. Touching the body of someone I love shakes both my heart and body to the core. I feel pain in my chest, unable to suppress these impulses. Love and lust entwine so tightly that I can no longer understand even myself.