I've managed to get my 8 week old into quite a good night time sleep routine. I start it at 6:30 every night and by 8:30 I'm able to put her in her bassinette where she will usually sleep until around midnight or 1am without interruption. Before giving birth my DH and I had dinner at my parents house once a week with my siblings; I told them I wouldn't be at the family dinners for 6 weeks after bubs was born, the past couple of weeks they've all been constantly asking when we'll be joining them again for the weekly dinner. I'd love to get back into it as we're a close family and I miss catching up with them but I'm worried that if I don't stick to the routine I've started her sleep patterns will deteriorate.
I guess I'm just looking for some advice. If you've been in a similar situation have you managed to alter your babies sleep routine occasionally without it causing problems or would it be better if we just put off going out at night for a while until her sleep habits are firmly established? If so, how long do you think is reasonable to avoid all night time invites?