Baby for MIL

My mother in law was recently diagnosed with breast cancer, COPD, and emphazema. I have never had a great relationship with my MIL, but I feel like I owe it to her to give her a grand baby before she passes.

I haven’t talked to my husband about this yet because I know he won’t agree.

Is this something I should talk to him about? Should we try to give his mom a grand baby?