how do you deal with toxic grandparents? here's a little back story sorry for the novel. my father has always been an…

how do you deal with toxic grandparents? here's a little back story sorry for the novel. my father has always been an alcoholic. I mean passing out drunk, never seeing his kids, alcoholic. I didn't meet him until I was 14 and felt some what comfortable enough to meet him. well about that time him and his wife at the time found out they were expecting. he stayed drunk any time I came to visit. constantly. I couldn't stand that so I gave him a choice. his alcohol or his daughter. you can tell by the tone of this what his choice was. well fast forward a few years him and his wife split due to his alcoholism. she has custody of my little sister. well he sobered up to be around her, to get visitations. yeah that made me a little sore. but what ever. well I tried having another relationship with him just to see if maybe he could finally be a father. I was due to have my daughter November 22, 2015. well since she was breech we were more looking at the 18th via c section. he wanted to be here since it was his first grandchild. a couple days before I had her (11/2/15) he calls me plastered. I honestly wonder how the man could have dialed my number. wanting to make plans to come see us and all. well him and my mother can't get along. not for her but for him he always talks down about how she done him wrong and what have you. I didn't want to deal with that, or the fact his mother who is the exact same way would have to bring him (too many DUIs lost his license). the woman constantly complains about how miserable he makes her and how she hates my mother, and my brothers father. who was also there because the man raised me he had a right to be there. well, when he called me plastered, he was calling me a bitch, whore, skank, little shit, telling me I had better call him when I have her so he can be there. due to the name calling and more so the fact he was plastered and I did not want that around me, my family, or have to have the poor hospital staff have to deal with it, I didn't tell him when the plans suddenly changed and I had her the next day after that phone conversation. his ex wife, my brothers father, everyone but him and his mom were there. of course my (I still consider her this) step mom and my little sister plastered photos of them with my daughter all over Facebook. so he found out and called me cussing me out the day after my c section telling me how much of a bitch I am how no one had more of a right to be there than him, how I'm a sorry POS, etc. for not telling him. I calmly explained to him that he was drunk when he called me I had proof he was drunk (my brothers father had given him a ride to go get groceries and he walks out with a bottle of whiskey) and that he lied to me about being drunk called me all sorts of names and that I didn't want that around me or my new family during what was supposed to be a happy time for me. so much drama that day it was UNBELIEVABLE! Anyways, it's been 6 months no contact what so ever, tells my 7 yr old little sister how I done him wrong and is waiting for my apology, then calls me this morning saying he misses me and wants to see me and my daughter. now granted my little sister knows about my son. so I am sure she told him, she is 7 after all. he wants a grandson so bad so I'm fairly certain this is the only reason he has called. I talked to my husband about it and he says there's no point in me giving him another chance after him doing this to me for 22 yrs. we don't want our kids thinking it's okay to be like grandpa, or being hurt when I have to stop him from coming around again due to his drinking. my dilemma is, am I wrong to keep my kids from him? he's sober as of right now, I returned the call and his boss answered saying he's working right now, and so I know he's sober if he's running Bob cats and bulldozers and cherry pickers and chainsaws. but do you ladies think I should? they will likely be his only grand children. I'm actually torn about this. not sure why but I am.