Maybe some basic principles of this would apply to anyone wanting to experiment with sexting but I'd certainly be careful using some of my suggestions here unless your husband has a cuckold fantasy, we're going to be sending some very risky messages and actually intending to seriously dent most mens fragile ego, if he's not comfortable with himself and this desire of his you're definitely going to be on shaky ground at times.
Now what I've found to be the key to these virtual hotwife games is what I learnt from my husbands military experiences in that you want to start well before you make it to the bedroom,
it doesn't matter how ready and willing you both are, you simply can't just start from scratch with no warm up. You want to start a virtual thousand miles away.
You want him coming home, throwing you over his shoulder and carrying you off in true caveman style (if that really is your thing and if it isn't it soon might be because you're about to light the mother of all fires under the ass of your strong confident husband returning from deloyment)
Now i found that i needed to have a "partner" in mind, maybe you don't. If you're like me then it can be anyone you can picture easily, the 50 shades guy, the masked guy in "those" books, even an ex (yes really) Fortunately I live near a local college and have my pick of young studs packing my groceries or pumping my gas for me while my husband works with a guy who's good looking, a womaniser and a total asshole. I've met him a few times and as a bonus my husband KNOWS he's an asshole for sure and can all to easily picture him doing these things.
I've even used the random assholes that we've all had message us at some point through social media, lead them on a whiles then just screenshot the dirty exchange and save it for later.
Remember, non of this is going to be real but the easier it is for you both to visualise then the more effective it's going to be. Disconnect that emotional love for your husband from your animal instincts, if the ideal breeding partner isn't coming to mind try the opposite, the absolute worst (but he's rich, a total bad boy or even simply hung like a horse)
Just a small tip before we get going, use a different messaging app than your regular one for this "virtual hotwifing" stage. This way you can still ask him to pick up milk without spoiling the mood
(If you can work out how to add text to the pictures, all the better. There's YouTube tutorials for all of them on how to do it. I've found that captioned pictures or even videos hit on a whole new level when what he's seeing is reinforced by the words of a simple message right there across the picture, he's forced to think exactly what you want him to think and it'll be burned right into his soul.
Men in general are very visual creatures at the best of times, use that!
Done right this message notification sound is going to be like Pavlovs bell so make it a different app for full effect.
Now for some fun, getting started is always the hard part but don't worry, there really isn't a right or wrong way to do this but definitely use your alternate messaging app for all of this. That app notification sound will very quickly become the whistle that makes all his dogs bark, LOUDLY.
I'll start in a variety of ways, a picture of my fresh Starbucks balanced on my steering wheel with my legs on full display *accidentally* in the shot and caption it with "cute new server, even got a free cookie".
Or a picture of a condom wrapper (magnum size of course) with the caption "server at the gas station was handing these out with every tank".
Or even a picture stolen straight from the internet of some young football player/s from the local college with a caption "just saw the team at the service station, they asked me to be their mascot".
While we might be looking at the cup, he's imagining me wearing a micro skirt in Starbucks. We would be questioning why a magnum condom, he's imagining a young hung stud pumping gas in grey sweatpants and as for the football team, he's already imagining you tied up in the locker room as half time entertainment.
See how easy this is?
You're outside his control, you could be doing ANYTHING and he's powerless to stop it (when in reality, I've done these while still in my pyjamas or on the school run before now, always keep multiple picture saved, he won't be forensically examining them like we might, he WANTS to think these things, he WANTS to suspend his disbelief.
Ah yes, powerless, there's one of those primitive drivers of his
Believe it or not that's probably exactly what he wants. This is the guy that'll fight a bear for you, provide for you, do anything for you and just at this moment there's not a damn thing he can do about anything. Being powerless is a very powerful emotive state for him learn to harness it.
Now add in some messages casually mentioning you're feeling horny today and you wish he was home, you must be ovulating because you could rip his clothes off and do it right there in the car, anything that makes it clear you're one good offer from making a bad decision!
(And there's nothing he can do about it, powerless remember)