Will my dog and soon to be baby mix?

My dog has always been on guard like I go in bathroom she follows and watched the door I go to bed she sleeps in front of door and everything I took her in when she was a pup and watched the ppl throw he out the window so I took her in and think she's owing me the favor but family says I need to put her down bc if the baby was to pull hair and I say ouch they afraid she attack but she wouldn't hurt a fly she here's the door knobs jiggle she wagging the tail and jumping up n down before you know who's here! So what should I do? J think she's fine I been practicing with a fake baby alls good