Write command working one way?

Question

I want to communicate with my girlfriend through the write command. She's on a mac, I am on a debian laptop. I did the next steps:

1. adduser haly
2. apt-get install openssh-server
3. systemctl start ssh

Then she logins with ssh haly@my ip address (we are both connected to the same wifi) with the given password. In our terminals we both do mesg y and I do write haly. She can see everything I write, but I cannot see anything she writes. What is wrong?

Thanks

[Editing to have a more complete question]

This is me:

murphy@eva02:~$ who
murphy   tty2         2018-12-17 22:58 (:0)
haly     pts/1        2018-12-17 23:25 (192.168.0.9)
murphy@eva02:~$ mesg y
murphy@eva02:~$ write haly pts/1
las rosas son rojas, el cielo es azul ...

She receives the last line in her terminal (after logging into eva02 and doing mesg y). But If she tries write murphy tty2 the write program seems to work in her terminal, but I see nothing in mine.

Answer 1

Nothing is wrong; write is unidirectional:

Any further lines you enter will be copied to the specified user's terminal. If the other user wants to reply, they must run write as well.

... so she must write your-username in order to write back to you.

You may be thinking of the more-interactive talk utility; on Debian, apt install ytalk will get you started.

Answer 2

Try having her add your device name. You can use who, w or finger to get this information. Usage: write username devicename , see if that helps...