The Dreaded Speakerphone

As you may know, my mom retired a couple of weeks ago. That's great! I'm really happy for her. Yada. Yada. Yada. Well, since then, things have gotten to be a little strange. I don't mean just ha ha strange. I'm talking, should we up her medication strange. First of all, I have to say that my parents are joined at the hip. I mean this literally. They do everything together, and while I appreciate this as their daughter, I find it a little disgusting too.
Well, now they've started taking a strength and flexibility (yoga) class at our church on Tuesday and Thursday mornings. Good for them. They run errands together. They clean house together. And what brought on my concern, they have conversations together. I don't mean to each other. I mean I can't call their house without talking to both of them at the same time.
Mom answers: Hello?
Hey mom.
Dad (in the background): Hello.
And so on and so forth. She will walk too far from the phone and I'm like, what? 

And she'll say: Oh, did I go too far?
My favorite from yesterday was when dad went into a coughing fit in the background. Instead of picking up the receiver, mom said: Oh, can you hold on, Dad's having a coughing fit?
This is just weird.