HUNTB-158 Sister found with pen between her legs, brother creampies her twice

When a man comes home, he sees his sister on all fours with a pen pressed against her crotch. She says it is a lower-body training exercise, but he finds the sight arousing and inserts himself raw. The training has made her tight, and he cums quickly. She gets excited too, so he continues with her on top, then pulls out and cums again, with sperm overflowing from her.