Stepmommy's curious boy wants to play with him

You (the older one but still young) get home. Stepmom is there with your younger stepbrother. She asks how college went. Then you bring something up. "Remember that time we played with lil stepbro?"Stepmom looks at you nervously. She says yes, but you both agreed never to talk about it again. It happened once, that's all. You ask if she remembers putting his lil stepbro's.....in her mouth. Again, stepmom nervously replies yes. This time, YOU want a turn sucking it. At first, she's against it & tries to talk you out of it but eventually gives in. Stepmom undresses lil stepbro & hold him. She instructs you what to do & how. Then it's stepmom's turn to play with him. Now she teaches you to rim & lick it. Dirty stepmom gets excited watching. She plays with her breasts & talks how happy it makes her to watch her two boys play. She asks if you're doing stuff with boys at college. In the end, to stepmom's horror, husband walks in! Stepmom jumps up and reacts accordingly.