Filing petition of mutual consent divorce 13-B

My wife left me 8 months ago and made false allegations on me in Police/CAW. and from that day she keep saying that she is pregnant and want to live with me. Last month she send me message from our mutual friend that she got baby girl. I know she is lying, there were never that type of relation between us. And when i check papers of police complaints and others, she has not given this statement in written anywhere. Now they want to compromise asked for alimony which I accept. But now in 13-B petition when I asked them to write that there is no child with this marriage, they denied to mention it. They are saying that nothing would be mention in 13-b petition about any child. I want suggestion that could it be against me in future? I am damn sure that there is no child of me. But if ask them to mention that there is no child then they would not do any compromise and they would go for court case. i don't want court case, i want to move on. Please suggest what should I do.