How to Deal with your mum's guilt trips

Here's a question from a coaching session… (as usual, it's been edited, summarised and certain details have been changed, to protect identities)...

QUESTION: 

"After getting coaching from you, I built up the courage to start calling my mum, who lives in another country. And for a while it was going good, but now, every time I call, my mum gives me guilt trips and she just gives me bad energy. 

She starts comparing me to other siblings. As you know, I was wronged by my siblings, but my mum claims the opposite. And the worst thing is she then gives me guilt trips for not being around. What's going on? How come it was in flow before, when I started calling her, but now it feels a lot more heavy and negative?"