A crazy woman is stalking my man, and we can't get rid of her - sort of long.?

Let me preface this with all of the people in this situation are over 30. My boyfriend and I have been in a strong relationship for over five years - not perfect, but stable. About a year ago, a close work friend of my bf died unexpectedly, leaving behind a wife and two kids. A few weeks after the man died, his wife called my bf asking for help with some work on her house since she had decided to move out of state. I knew she called and that my bf helped her out. I do NOT have any suspicions about the help he gave, and she knows he and I are a couple, although I have never met her. Later he helped her pack heavy stuff, and I knew about that, too. He told me she started crying when she was packing, and he hugged her.

After she moved she sent my bf a laptop computer and thanked him for his help. He told her he wouldn't accept it, but she insisted, saying her dead husband would have appreciated what my bf had done for her and the kids. Fine. We got a laptop, but, since then she has gone crazy! She sends my bf gifts almost every week, calls as many as 25 times a day, tells my bf she loves him, he's her savior, and on and on. Since she is over a thousand miles away, I don't feel jealous or worried - in fact I feel sad for her, but she's getting more and more weird.

My bf blocked her number, but then she started calling him at work (she knows the place because of her husband). It became so constant that he unblocked his cell so she wouldn't fill up his work voicemail. (Literally) My bf has told her multiple times while I was present to stop calling, he loves me, he doesn't want to have anything to do with her, and even said she was crazy and needed help. It doesn't matter. She continues to send gifts, offer my bf (not us) vacations, and even money to start a business. Once she sent him ONE ticket to a Dallas Cowboys game in Dallas - we live in CA, and I suspect she had the ticket to the seat next to him. My bf sold the ticket and gave me the money, and he told her this. He has even handed me his cell phone to respond to some of the texts she has sent. I don't have any worries about my bf being lured away, but she seems like she is becoming less stable and more persistent.

Most recently she told my bf she wouldn't be jealous of me. (???) I also want to add that being downright cruel to her hasn't changed anything. She just comes back. She doesn't have any family except her kids, and like I said, I really do feel bad for her, but what would you do? My bf said we should just let her keep sending us stuff and ignoring her calls, and eventually she'll go away, but her husband died almost a year ago, and she's still a wacko.