My sister-in-law is always modest and reserved in public, dressing plainly. But I know her secret: if she takes off her glasses, she's incredibly beautiful. My feelings for her exploded, and she found out that I liked her. 'You must be joking...? Really? But we're siblings, even if it's just in name...'. But I couldn't hold back, so I at least begged her to let me do some frottage. When her pussy became slippery from rubbing, I couldn't take it anymore and forcefully inserted myself, ejaculating inside her!
