Unless you have a reason as to why USCIS will deny your petition then I see absolutely no reason as to why you put family things on hold. Especially that you are already a resident even though conditional. Unless you have something in your background that could bar you or affect your immigration (criminal history, lying to the USCIS and etc) then there is no reason to be concerned. I'd say you have a better chance of getting struck by lightening then having your residency taken away. Even if the petition gets denied for USCIS error, missing documents and other administrative things you can refile. Only the immigration judge can take your residency away (That will happen only if your petition gets denied, your get Notice to Appear and then you do nothing to remedy this). That said you have plenty of opportunities to appeal and prove your case in the case of a bad outcome for your current pending petition.
All the above assumes no funky business in your background.