If you're looking for a meeting place or a good stop around ½ or halfway between Cincinnati and Farmers Branch, you can try Memphis, TN, which is about 7 hours southwest of Cincinnati, or about 7 hours northeast of Farmers Branch.
Other possible places to stop near the midpoint include Covington, Germantown, Bartlett, West Memphis, and Forrest City.
About ¼ or a fourth of the way, you can stop at Nashville, TN. This is almost 4 hours southwest of Cincinnati.
About ⅓ or a third of the way, you can stop at Dickson, TN. This is about 4½ hours southwest of Cincinnati.
About ⅔ or two thirds of the way, you can stop at Little Rock, AR. This is almost 9 hours southwest of Cincinnati, or about 5 hours northeast of Farmers Branch.
About ¾ or three fourths of the way, you can stop at Arkadelphia, AR. This is about 10 hours southwest of Cincinnati, or about 4 hours east of Farmers Branch.
If you drive straight through without stopping at all, the total distance is 941 miles. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 13 hours, 49 minutes.