If I claim my mother-in-law (who lives with me) will that bar her from receiving the stimulus check? And can she still file her own taxes on the SS she receives?

My mother-in-law lives with us full time and we support her 100%. However, she does receive a sum for SS. If I can claim her and she still received the stimulus I would like to, but I won't if it will bar her from getting a stimulus check. Not sure if she just needs to file her own taxes and mark she is claimed as a dependant or if she has to file totally separate.