9 month old won't nap in crib

STint520

My DD is almost 9 months old and will only nap in her swing. We've tried numerous times to nap her in the crib, but she will only nap 20 minutes, where in the swing she naps a good 2 hours. We've tried the CIO, but she shares a room with her brother so that sometimes is not a good idea since he wakes up. Also, we put her down to sleep at around 7:30 at night...she sleeps till around 1am, but then refuses to go back in her crib and will only sleep in a bouncer. I think she likes the comfort and to snuggle. How can I change this habit? Any help would be greatly appreciated! TIA!