Welcome to Pherotalk Dukebox!
Your wife just needs some patience and some time to relax right now. When it comes to sex most of us women are very emotional so if she is stressed because of the new born and feeling less than desirable her libido will not be the same.
According to how old the baby is she might not want to leave him with a family or friend so you guys can go out which is what you will need , a change or scenery to get her to relax.
I will start off with honesty for communication, instant gentleman to give off that mature, dependable vibe , shine to make you feel good and her feel that energy and tuth when she is relaxed and comfortable enough to get back into the saddle. 
Your gc was issued! 