My therapist

So at my appointment today my therapist said he thought it would be a good idea to have Joel join us for my next session. I wasn't sure what to say. Joel and I are very open. We talk about everything. I don't hold back or hide the crazy in my head. He doesn't either. He tells me his fear, everything. I have seen other couples sit in the same room and not talk for hours and stare at their phones. We don't do that. After the kids are in bed we get our drinks, our cigars are we talk. He tells me when he's had a bad day, a good day or a boring day. I do the same. Some nights we laugh, some nights we cry and some nights it's just calm. It's good. Really good. I tell him everything I say in my sessions. He's seen me at my worst and I've seen him at his worst. So I'm just not sure why my therapist suggested it. I'm not opposed to it. I'm just confused.