MIL starting to get in touch…..

So long story short Me and my bf have not talk to my mil or his sisters in over a year due to my mil watching my kid who was 2 years old at the time and was under her care and my kid broke their leg and when we asked what happened I wasn’t given a answer nor did she tell me the truth and got 2 completely different stories on what happened . So she recently wish my kid a happy birthday through my bf and then she texted me saying happy birthday to me but has not told us the truth and at the time only cared about who we told and she told me sorry when I was at the hospital but didnt ask how she was doing or anything until we got my bfs fam tried to switch it on us and make us the bad guys. So she recently called me and my bf but we didn’t answer . I feel like not talking to her but wondering if she is trying to get back into our lives. Our life has been drama free