Ever "experimented"?

"So tell me Alice..." Amina says as she places her hand on your mother's knee "...have you ever been with another woman?"

"N-no, I haven't." Your mother looks away. She hasn't just bolted up and left so you know this is leading to something good. Taking advantage of your 'invisible' state, you get out of your bed, for not only a better vantage point, but also to start recording the unfolding scene on your computer.

Amina slowly turns your mother's head to face her. "Well, looks like I'll be your first," Amina says as her hand goes up Alice's thigh. Your mother lets out a gasp, which is quickly muffled by Amina's mouth. This must have set something off in Alice as she hungrily returns the kiss while reaching up to fondle Amina's breasts.

"Mmm, you like my tits?" Amina purrs. "Yours seem nice too, unfortunately that shirt is in the way." With a smile that you're not sure is bashfulness or playfulness, your mother lifts off her shirt and bra exposing a pair of breasts you haven't seen since a baby. "Oh, I was right," Amina says, taking one into her mouth as she slowly pulls off Alice's jeans, leaving them both completely naked.

"So what now?" Amina says, looking at you, though your mother thinks she asked her.