i'm sorry, but you can't do anything to stop cheating behavior. they have to want to stop and put in the work to stop. often they just get better at hiding it. i'm sorry because i'm sure that's not the answer you were looking for. if there were anything in the world i could have done to make my husband stop, i'd have done it. and lord knows i tried. but it comes down to them. if they aren't ready to stop, they won't. and many continue that pattern for the rest of their life and on into future relationships.

Cheaters don't stop.

Im sorry you are going through this!
Have you talked to him about it?

There are 3 things you can only do for yourself and no one else Control, Change and make Choices.

You can't control him, he has to control himself. You can't change him, he has to want to change and you can't make his choices. You could change his password on Skype and he could go underground and open a new account at any time.

No one is trapped in any situation, you are making a choice to stay. That choice feels mandatory because you feel you need his financial support. That would assume you have no one else in the whole world to support you until you get a job and are able to support yourself.

There are millions of single moms raising kids, working and going to college. You don't need him, you are just more comfortable with your life as it is then making a choice that might take more effort.

Could the Skype account be left over from when he did use it?

Does it have a history that you can check to see who he's been skyping with? You could always ask him if he still uses skype and with whom if he does.

I can understand your situation going back to school and raising a child and not being able to leave. It's a hard place to be in and can often leave you feeling vulnerable and in a place of fear.

Start with asking him and see where that goes.

First, I'd determine whether or not he is still cheating. You don't want to take action on a "probably still cheating" hunch. Do some more investigating, use a key logger on his computer if need be.

If he is, then I would at least start with the 180. Someone recently bumped it. Use it to help you gain some independence. Meanwhile, confront him, then work out plan B if he fails to come around and stop. That may take a while, but put it in place. When you are ready and he's shown no signs of relenting, then you'll be ready to pull the plug.

At some point in this process he may snap out of it long enough to stop and get help. It also may not happen. That is up to him.

You control your decisions. The 180 should help you to establish that.