Upon discovering her pregnancy, her sister-in-law (who was already impregnated) found herself neglected. Left without her husband's attention, her lonely core ached. Pretending to care, her brother-in-law teasingly toyed with her, and unexpectedly received her consent! Initially, it was a slow, gentle piston-like thrusting, but it gradually turned into a relentless, deep piston motion, leading to an unexpected internal ejaculation!
