What would you do about this situation?

My husband and I have been together for 7 years now. He has an ex step daughter and an ex step son from his previous marriage which lasted 4 years (their divorce was in part) because of them. When he and I first started dating, they came around occasionally (usually it was to ask for money or favors) but they (especially him) were always extremely disrespectful to me even tho I tried to be cordial and inviting to them. So after a couple of years of being treated this way, I put my foot down and told him that if he can't be respectful of me and my home that he needs to stop visiting, he was nothing to me and I don't let my own children treat me this way. My husband was behind me 100% and even commented that he wished both of them would just stay away and leave him alone. So, fast forward about 6 months, I left one morning to take my mother to her chemo treatment and I am usually gone several hours. That particular day, I had some work I needed to get done so my mom told me to go get it done and come back for her later. Well, when I arrived at home, there was a strange car in my driveway frantically blowing it's horn. Come to find out, it was him and his wife, he was in my house, and she was being the look out. They were there trying to steal my mothers pain meds. I went off and told them both to get the hell off of my property and for them to never come back, because the next time I won't be so nice. Did I do the right thing? What would you have done?