BASE-118 - Sister-in-law, what are you doing in the bath when your husband is away? (Mixed Bathing 2)

I've always had a crush on my sister-in-law. One night, I caught her masturbating to soothe her loneliness, and something inside me just snapped. 'I'll make you feel good instead.' 'No... even if we're not blood-related, we're still family...' But with her husband away, she can't resist my primal instincts anymore. We fall into a forbidden spiral of lust, ignoring the fact that she belongs to my brother, and indulge in the pleasure we've both been craving.