Sign on the dotted line

My owner had a funny day. She was looking through her student's spelling book and she noticed that the "parent" signature on one of the tests looked different. Here's how her conversation went from there:

"Hmm, Joseph your mom's signature looks a little odd here..."

"Huh?"

"You see... tests #1 and #4 were signed by your mom in cursive writing but tests #2 and #3 - the tests that you failed - were signed differently. It actually looks like your handwriting."

"Oh... umm, my dad signed those tests because my mom was tired."

"Well why didn't he just sign his name on them?"

"Huh?"

"Why did he write your mom's name instead of writing his own name?"

"Yeah my dad, uhh he..."

"Okay next time I want you to tell your dad or grandma or whoever signs your test to sign his or her OWN name."

(Silence)

"And I want your mom to re-sign tests #2 and #3 tonight and you need to show me them tomorrow."

(Silence... looking a little nervous...)

"Annnd I'm going to put some clear scotch tape on these two signatures so that nothing happens to them on the way home... and your mom can sign next to them."

(Silence... starting to tremble...)

"Annnnnnd I'm going to call your mom to tell her about our little conversation so she knows to look for your spelling book when you get home."

"ok."

"Alright then, you may head back to class. Have a great day!" :)