Post break up weirdness?

Me and my ex broke up fairly recently... I was good friends with his sister before we met and ended up spending a week at her place where he also stays. 5 nights he stayed here as well and we slept in the same places and cuddled one night we did sleep together then the the last 2 nights I’ve stayed he didn’t come back. He messaged me the morning after one of the nights he stayed and got my mom a present and wanted my opinion then he gave it to me instead of delivering it himself... he hasn’t spoken to my mom since we broke up. Why do all of that?
Post break up weirdness?
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