My SIL sucked my soul out as we had dinner together...

I, a 40-year-old woman, had an unexpected encounter last n. My wife had invited her sister over for dinner, and I had been noticing some sexual tension building up between us. As she walked in, my heart raced, and my body reacted. We all sat down to chat, but the tension between us was palpable. My wife went to prepare dinner, and her sister excused herself to use the bathroom. I sat at the dining table, trying to calm myself down, when my wife returned and asked about her sister. I simply replied, 'She went to the bathroom, she'll be back soon...'