With her mouth

"You only used your hand" says Teresa "but this is so big it will need more than that. The muck is in so deep that I'm going to need to suck it out like a vacuum."

She takes ahold of your dick but, before she can begin, you take off you glasses and tilt her head up so you can make eye contact, placing her in a trance again.

"You will love the taste, and feel, of my penis in your mouth. It will taste like a yummy treat and your lips will feel like your pussy lips. Your tongue will feel like it is connected directly to your clit and licking my cock will make your pussy react like someone was licking your clit. The only thing better than sucking my cock will be the feeling and taste of me orgasming in your mouth which will taste and feel like liquid sex and make you feel like I am cumming inside your cunt, filling you with my seed and satisfying your most primal sexual need."

You break eye-contact and Teresa takes your cock and places her mouth over the head. The moment she does she groans, making her lips vibrate wonderfully, and then begins to suck and lick your cock with earnest. She doesn't try to 'deep throat' you but rubs the bottom of your shaft with one hand while massaging your balls with the other, a combination that feels nice enough that you don't care. Your stepsister has obviously practised 'giving head' on other guys and while you might have felt envious before the accident the fact that you have 'practiced' with a couple of girls since then makes you realise you'd be a hypocrite of you did.

Teresa continues sucking, licking and working on your cock for several minutes, becoming obviously more aroused as she does so, until you cannot hold back any longer and empty you balls into her hot wet little mouth. The moment you do she squeezes her legs together and groans around your cock (a wonderful feeling in itself) before taking her mouth off it. Her cheeks are still filled with your spunk, some of which is leaking out the sides of her mouth, but she is looks happier than you've ever seen her, and seems to be enjoying the taste, trying to hold it in her mouth for as long as possible before she eventually swallows it down, wiping up the spillage so she can taste that too.

"God" she says "I don't think I've ever felt so good about giving a guy head. I would say that was better than sex but I wouldn't know. It's certainly better than any head I've ever given before, but a long shot. How was it for you?"

"It was wonderful" you say, honestly "You are wonderful. I wish we'd done this earlier."

"Me too. She admits."

You lower the glasses and have her help clean up the bathroom while you decide what to do next.