Talking about: your teen's role in it all

If they ask...Is it my fault? You could say...No, none of this is because of you.Tell them that…There’s nothing you could have done that would have changed this.
If they ask...Will you stop loving me?You could say...Just because I don’t love them any more, doesn’t mean I don’t love you.Tell them that...No matter what happens, I will always love you.
If they ask...Can I fix it? Will you get back together? You could say that...It’s not your job to fix it. Tell them that...You and your siblings are super important to me, and I will always do everything I can to support you.

Talking about: taking 'sides'

If they ask...Will I have to choose where to live? You could say...That might be something we all need to think about. Tell them that...I'm going to try my best to make sure there isn't too much change in your life. 
If they ask...If I like one of you more, will the other get upset? You could say...We're both still your parents and want you to keep loving us both, even if we don’t get on. Tell them that...It's pretty normal to get along with different people in different ways. 
If they ask...Can my stepparent tell me what to do? You could say...It’s important to respect your stepparent, but we can work on it together. Tell them that...We’ll discuss the ground rules beforehand, so you know where you stand.

Talking about: future relationships

If they ask...Are you seeing someone else? You could say...It’s normal to wonder whether I’m seeing anyone. Tell them that...If I’m getting serious with someone, I’ll tell you and we can chat.
If they ask...Will I get divorced someday too? You could say...Just because I got divorced, it doesn’t mean you will. Tell them that...How about we have a chat about relationships—what you think works well, and what doesn’t.
If they ask...Can I be friends with mum or dad’s new partner? You could say...Yep, it’s okay to like them, even if I don’t get on with them. Tell them that...We can figure out how to make things comfortable.