I haven't talked to my MIL in 5 months. Right after moving here, I called to let her know our new address, but before I could even tell it to her she went on and on about her own life, not asking about how our move went, how my new job was going, or about our new house. I ended up emailing our address to her.
My husband was so annoyed by the constant phone calls asking if we'd received it, that he told me when it came in to just mail it back. I didn't and the day after we received it, I sent a thank you letter and another email to my MIL telling her that we had finally received it.