No Lesson at Easter

My first-thing Saturday morning student comes nearly every week.  Of the year.  The Saturdays closest to Christmas and New Year are usually taken off, but apart from that - unless I'm away - he has a lesson.  He's now 15, and his mum always comes to the lesson too.  At the end of every lesson, his mum asks "Same time next week?" and usually my reply is yes.  But last week:

Boy's mum: Same time next week?
Me: Ooh - actually, no, don't come next week.
Boy's mum [surprised/concerned]: Oh - why not?
Boy [in that "I can't believe I have to explain this to you" tone of voice]: Mum, it's Easter.  She wants a holiday!

Like, duh.

Mothers

After ensemble, there was a mum sitting on the bench outside the room.  There were a few girls hanging around in the rehearsal room, and I wanted to check that the mum wasn't waiting for one of them.

Me: Is that anyone's mum?
Girl 1: No... My mum has short hair.  Like, really short hair.
Me: Yeah, I knew it wasn't your mum.
Girl 2: Well, it's not my mum.
Me: I knew it wasn't your mum either, really.
Girl 2: How do you know what my mum looks like?  You haven't seen my mum, have you?
Me: Yes I have, at our performances.
Girl 2: Well, what does she look like?
Me: Like a taller, older version of you.  With shorter hair.
Girl 2: No she doesn't!
Girls 1, 3 &4: Yes.  Yes, she does.