Tenant's son is hospitalized and late on rent payment

[Sai T.]

Hello,

I have a new tenant (single mother) moved in last month 9/1/16 paid 1st month rent and SD. I gave option to pay last month rent in 2 payments 10/1/16 and 11/1/16. Late fee $150 till 1st till 15th of the month. Overall I had a good impression about the tenant.  On Saturday 10/1/16. I called to remind her to pay the rent. 

No response then on Monday  emailed and 2 phone calls again no response. 

Today, I got this from her 

"Good Morning

I am just receiving your voicemails and email i first want to apoligize for not getting in touch with you but my mind has been in a thousand places. I have been in the hospital with one of my children for the past two weeks. I will pay my rent friday morning with late fee also. I am sorry that it is late but i took a paid leave from work and had to process paperwork before check could be sent out. Also i will have to pay the half of the last month on thursday 10/20/2016. If i need to attach a late fee with that please let me know. Both jobs send checks at seperate times so that is why the laat month half will be later i am very sorry for this inconvenience. My son will be coming home today and i will be returning to work tomorrow so after this everything will be on time again i am very sorry about this and not getting in touch with you sooner."

Question : I don't know, if she will pay the rent this Friday but I'm not sure should I charge $150/- late fee ?