Mom want see baby, but mom showing symptoms ?

So last month my mom has been coughing , having headaches, and having direah and stuffy nose for couple weeks. It’s been going back and forth. I told her she should go get tested Incase but she says it’s nothing it’s just her allergies and because of the heat outside. My mom does get bad allergies but My mom never coughed this much before when she would get sick from allergies. I don’t live with my mom I live a house down from her. And that’s just what my sister (14 yrs old) told me that my mom been showing symptoms. At the same time my mom has been showing symptoms my other little sister (7yrs old) has been coughing for awhile as well and had little fever. I told my mom that they should go get tested to be safe because with covid going on it’s very serious and I want them be okay. So my mom says okay that they will. But few weeks earlier she still has yet get tested. She keep saying she wants see my baby (3 months old) (I’m a first time mom) and it’s my mom first time being a grandma so she super excited see baby she’s only seen my baby very few times before she showed symtoms . So it’s been 1 month or 2 since she seen my baby. but I told her had she been tested yet and she says no but that her and my little sister are not coughing anymore and They don’t feel sick. She says she checked their temperate and aren’t having fever. I really miss my family and I want them see my baby and I really hope they are okay and didn’t have covid but I just don’t know if I should let them come see us if they haven’t been tested after showing symptoms? I’ve been very careful ever since I was pregnant and after I had my baby. I make sure I don’t go no where unless essential ( I keep my baby at home with my in-law & bf who I live with if I go store ) we always wear mask when we go out and we constantly sanitize our hands. So I don’t want to risk anything .

It just makes me mad my mom won’t go get tested and to get my little sister tested cause it’s very serious . Espically since my other two sibilants live with my mom, they could end up getting the virus too if she doesn’t be careful. I don’t want anything to happen to them. I love them so much I just want them to get tested Incase so that if they do have it they can get help from doctors make sure that they get better & so that they don’t bring it into our house espically cause of my baby. But I’m hoping they don’t have it cause with covid it’s scary thing . What should I do, should I still let them come even tho they aren’t showing symptoms any more and no fever? Or should they still get tested before comming ?