How can I make a living room with leather couches more feminine?

I've reupholstered just the seat cushions in a nice upholstery weight fabric that complimented the,leather. Add a colorful chair and pillows. Fun area rug and valances .

Your accessories and artwork make the difference, area rug, pillows, throws, lamps, etc.

Lighter curtains, throw rug, throw pillows? Maybe drape a throw blanket over the top of the couch?

Think throw pillows, a blanket with a feminine touch, the decor pieces you place in the space, and fresh flowers. Make it a balanced mixture so it all blends and flows together.