sweets you are not a failure by any means ....but .... you're also pregant according to the ticke rin your signature so with all due respect your post is a bit left field.

You have had a rough start on your parenting journey but clearly its really happening for you too so I cannot understand why you feel so bitterly towards your SIL.

I think its nice that they do the present exchanges away from you,they obviously love you enough to consider how it may impact you. My family wouldn't be so considerate!

Too answer your question - you say "congratulations, I am really happy for you" anything less would look bad. Deep down you are happy for them, its just masked by jealousy but soon you will have your own baby and just imagine how over the moon they all will be for you!

Nae x