Or maybe it was done with good intentions, but intentions aren't what counts. Concrete actions count, and these actions are rather questionable.
Maybe they couldn't find another way to try to convince their friend to forgive this third person, but if they couldn't find a way other than forcefully inviting him into their home, maybe it was because there wasn't one. And it doesn't have to be one.
Sometimes we don't want to forgive a person, and luckily, we don't have to. We're allowed to decide who gets to have a place in our lives, and that place is sacred.
Frankly, after this incident, I would question the place the other two people have in the unsuspecting host's life.
Guilt is not always an emotion one should listen to. Sometimes it's there to remind us that we've done something bad, but other times it's there because we don't know how else to process an ugly emotion we're feeling.
We don't need an excuse to refuse to open our door to someone we don't want to let in. Simply not wanting to is a completely valid reason. It's not really necessary to overexplain ourselves, especially if the ones listening would be those who forcefully brought an unwelcome guest to our home in the first place.
That said, this incident deserves a follow-up, but I don't know which would be best. Should she simply tell them she wasn't home and ignore it altogether? Or should she confront them about what they did?
I'm not sure somebody who does something like this deserves to explain themselves over conversation to begin with, but that's just me.