A Sibling for Jayden?

We had really hoped that Esteban’s kids would be able to come join us in Florida, but it didn’t work out that way. Our requests were denied so it will be a long time until green card requests are processed. I hoped the kids would join us and that Jayden would know what it was like to grow up with siblings. Now, that the plans have changed I asked Esteban, “Now that we know that the kids won’t be coming any time soon, don't you think we should give Jayden a sibling?” He wasn't for the idea, but he wasn't against it. I gently reminded him that we don't have the luxury of time. I'm 34 now and I don't want to go through a pregnancy after the age of 35. There are too many risks and tests and doctors prognosis’. He’s coming around. If we start trying now, Jayden would be 2 - 2 1/2 years old at the birth, which would be perfect.