Change font size within testimonial block

https://flute-alligator-dfrx.squarespace.com/

password: floral 

Hi! I have a testimonial (list) block on my homepage. My client is wanting the name/location of the review (for example: "Rebecca, Los Angeles") to be smaller. However, it's hard to target that specifically since that name/location is part of the actual quote (aka it is apart of all the text above it as well). Is there a way to target just the name/location to make it smaller without effecting the text above it? Thanks! 

Add to Design > Custom CSS

body.homepage .list-item-content__description p:last-child {
    font-size: 10px !important;
}