Fiona, I think you're being a fab sister by supporting her as you are. It's absolutely terrifying telling a chap he's going to be a dad when he's not expecting it, especially when you know you're going to get a negative response, so it's good she told him now rather than let him figure out she was getting a bit podgy.

My DH was not at all happy when we found out I was pg - luckily neither of us would ever go for a contraceptive abortion, but that's not to put down anyone who would, especially as my DH jumped in a week after we found out with reasons why he would abort, such as chromosomal illnesses - and it's taken him a good three-and-a-half months to start coming round to the idea. I hope your sister's boyfriend is going to be like that and look after his new little family.