history: I was talking to my mom and she told me my step dad has been having some heart troubles. I went to their house and finished their garden for them. 
current: I was talking to my mom one day and she was telling me that my step dad was having some heart issues. He was in the middle of a big garden project and could not finish.
next: I'm sorry to hear that.  Do they know what the issue with his heart is. 