ANSWER: Thank you for your question, I have given your situation much thought and consideration given its delicate and personal nature. I hope this helps even a little towards you getting away safely. Before we get into any spell work or magic that you can use in your situation, depending on what is in front of me, I sometimes like to explore practical solutions before heading into magical ones let’s take a minute to talk about practicalities.
You don’t say where you are in your question but there are a few places you can contact for help. For the UK try https://www.refuge.org.uk/ or https://www.womensaid.org.uk/ and for the USA try https://www.thehotline.org/ . All of them have many practical resources and help available if you need to escape, they also have checklists that can help you to plan an escape for you and your children. Hopefully you can access them while at work and find some help and support for you all. Other options include talking to your doctor or nurse, they can usually provide support of some kind or help you make a report to the police too. Of course, if at all possible, you should consider calling the police for help as abuse of this nature is a crime.
There are two steps to the magic you need to take, I believe this is doable at work for you. The first is to disarm the man and make him less of a threat to you while he is still in your home. The second is to get rid of him entirely.
We will start with a simple binding spell. Get some of this man's hair (try scraping under his razor blade) and then mould a simple plasticine (or wax/clay) figurine of him. Nothing elaborate, keep it a simple person shape. Personalise it by carving his name (the name he is known by if it is different to his birth name) onto the centre of the figure (poppet) and pressing the hair into the poppet. Next, find a piece of string and physically bind him. (For a malicious working I like to tie the string very tight, so it warps the shape of the poppet and squeezes him out of the recognisable shape of a human being.) While you are doing this, visualise him squirming against his bounds, unable to escape and powerless against the confines you are placing on him. State your intention clearly - "I bind you, so you are powerless to cause further harm to me and my children." Then seal him in a jar filled with salt (I rather enjoy pinning said victim to a cork board with long needles but the jar will work better for the next stage and you’re already drawn to a jar spell so it makes sense).
Now you have your bound poppet in a jar, the next stage is to start to make this man disappear from your life. Once a week, open the jar and with a pair of scissors carefully snip a small amount from the poppet (say 10%, the idea being that when you have done this ten times he will be gone). Don't worry you will not physically harm him by doing this, I know the films show poppets as literal representations but the magic we are doing here is very different. Burn the piece you remove from him somewhere suitable. Complete this weekly, snipping the same amount off until the poppet has all been destroyed and burned and the man has gone from your lives.
All magic works best when its paired with sensible, direct and practical steps taken in the physical world so I urge you to consider the pointers I gave above and make it happen – I have every faith that you can.