You sound like us not so long ago. We had the same probs with our older two being with their birth dad leaving Olivia home alone...so after much discussion we had a vasectomy reversed and have now have our beautiful baby Sammy. We really dont notice any difference at all. I know the girls are older than yours are...Olivia (our youngest) was 63/4 when Sammy was born but we have found that it has evened up our lives enormously. We already had the bigger car and Olivia and Emily were already sharing a room so we didnt really have too many probs adjusting to 4 instead of 3. Now we can say..ok you two big two...you middle two....you little two lol..which is kinda silly its just a bit more evened up. Goodluck with whatever you decide!

Jo