so... my in-laws keep calling my son "our baby".. like everything is our boy or our baby... i…

so... my in-laws keep calling my son "our baby".. like everything is our boy or our baby... i understand they are excited as this is tgeir frost grand son and nephew.. but I'm feeling like I'm just the incubator here.. like I'm not the mama but the lady growing "their" grandson and nephew... i know that's probably not the case and my hormones are just possessive but this frustrates me... i feel like it's exclusive.. like why not say "the baby".. I'm probably reading to into this to much but they are possessive to... last time my in-laws visited they took pictures with themselves and their son... there were like only two pictures of me and i was with them for over two weeks!.. they are good people but this irks me.....