Has as had a scan yet?

Brown blood can be from a sub chorionic hematoma.

I'd reassure her but recommend she see her GP. I only say this because I had similar bleeding at 13 weeks once and went to the ED to be checked. I then found out that I'd had a silent miscarriage at 8 weeks.

Obviously at this point you wouldn't mention anything about loss but just to cover all bases it's best to be checked I'd say.

I wish her all the best!
xx