Truman: Yes, every couple of months or so. That's where I was after about a year of marriage. Now, at 5 years, we ML about 2-3 times a year.
Basically, you have to tell her that, no, you're not interested in bringing another child into the marriage, and no, you will not stay in a nearly sexless marriage forever.
But there are issues here besides sex, my friend. You'll have to figure those out, too.
I feel like I've been a tape recording all week, "see a marriage counselor, see a marriage counselor, etc." It shows them you're serious, and it can end up being the thing that saves your marriage.