My wife is not satisfying me in bed any more and am afraid I might cheat

This changed when she gave birth to our second child about a year ago

I am 26 and totally confused because my wife is not satisfying me in bed anymore. This changed when she gave birth to our second child about a year ago. I love her and do not wish to ever cheat on her. I have tried to ask what we can do but no answers have been forthcoming. I am sexually starved and I am getting tempted to look elsewhere to satisfy my sexual needs. I am afraid I may fall into these temptations if this continues. Please help.

{Wilson}