Impact of possible dc3 on our family/older parent

[monkeytree]

Hi, I am 40 and have 2 dd's one who is nearly 8 and another who is 8 months. The gap in ages was partly intentional and partly because I have fertility issues and was told that I was unlikely to have a second dc which increased the gap even further. Our miracle arrived and now I am wondering if I could tempt fate and have a third dc. I know that if this is in anyway to become a reality then we will have to begin trying asap. My husband who is older than me is not so keen and says that he feels comfortable with the 2 dds. He is worried that our older dd will feel left out if a new sibling came along who is closer in age to baby dd. Also concerned that baby may have health difficulties. Baby dd has a heart murmur (believed to be innocent) and was born with protruding skin tag on her cheek and ear which will need removing soon. Is it unfair to think about another dc due to potential health implications? Husband also concerned how I would manage with another little one so close in age, sleeplessness etc. The fact that I have fertility problems makes the reality of another dc appearing quite small but still why cant I let go? This is a last chance decision I feel. Anyone had similar experiences/any comment to make?

[Foxeym]

I don't think age matters really, my DC3 is also 8 months and was born with a birthmark over his eye which is fading now, it was just one of those things, could have happened at any age. My other 2DCs are 15&13 so quite a big gap. We are considering having another and I was 42 when DC3 was born so I'm looking at 43/44 if we are lucky to have another