I don't think it is.
I have never been in a situation where I had to make that decision, but I wouldn't fault someone for breaking in and re-taking possession of their own stolen property as long as they did as little damage as possible on entering, and didn't take anything extra. What about you?
I think it is the same sort of situation where using violence against someone who is initiating force against you is not attacking them, but self defense.
I also don't think it is "cheating" if you don't stay faithful to the remnants of a relationship where the other person has unilaterally ended the sexual component.
And, there are other similar situations out there.
To me it all comes back to "who started it?"