Ya ~ that is a stressful place to put yourself

As much as I hate conflict myself IMO termination is something that is best done in person ~ I actually have right in my contract that clients can not do it via 'email' it has to be in writing and handed to me in person so there can be no 'misunderstanding' around if it was received so I would expect myself to do no different .... even if it is the old 'there is a letter in the diaper bag please take a moment to read it when you get home and give me a call if you have any questions'. That way you are SURE that they have received it.

If it were me I would either 'call' or as Momof4 has suggested print out the copy and 'drive over' and drop off the things for them ~ even if she had emails confirmation of the email I would take the stuff to her either way as I would not want them showing up on my door for their 'stuff' either just in case she is not professional about having been terminated and comes cussing in front of other clients or the children.