Therefore, this is a perfect time for you to talk with your sons and daughters about what a healthy relationship looks like to them! Do they know what their boundaries are? Boundaries are defined as "lines that mark a limit". It is often the case that many children are not aware of their own limits and boundaries therefore they do not know when they are being crossed until it is too late. Hence the reason these conversations are so important! It is also an important discussion to have that just because a line has been crossed in the past does not mean a NEW limit cannot be defined that mark's the previous situation as off limits now.
So talk with your children about their limits and definitions of healthy relationships because sometimes even the most basic of things, like the ability to hang out with friends without the significant other present, is something that should be discussed! I personally like to remember that a healthy relationship should look like a venn diagram.