My ex boyfriend keeps texting my mother, why?

My ex boyfriend broke up with me last month, I was devasted and embarrassed. He left me for another girl. Anyways we've broken up before and always got back together because we never tried NC. This time I tried it. I blocked his number and Social media. It's been 3 weeks now. 5 days ago he started texting my mom, which is weird because they never texted before nor has he called her. He texted my mom Goodmorning and he said he misses her. He then texted her the next morning with a picture of him and her (don't know why he still has that). He then texted her a video of me and my mom that I recorded on his phone months ago. My mother is a chef, today he texted her a picture of a food she had cooked for him and I. And he says he misses her food. Lastly, she texted him a picture of what she cooked today, he said he wanted some. She said "come to the house whenever to eat." he said "yes! Can't wait".. He also told her to make sure that I'm safe and happy. I don't get it, he broke my heart and left me, why is he trying to be my mom's friend. I looked on his IG and he has pictures of that new girl up as his WCW and stuff. Why is he texting my mom all of a sudden? Is he playing mind games?
My ex boyfriend keeps texting my mother, why?
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