How can I tell if his mom likes me?

So I’ve been to my bfs house twice since we’ve been dating which is one year and almost 5 months. I haven’t been to his house really because his parents are hardly ever home and I am his first real girlfriend so he was kinda shy to have me there, even though I’ve met his parents the first month we were dating. His mom is very nice to me. She made me food and bought me strawberries and stuff and seemed like she was trying to really get along with me when I was over at his house these last two weekends. I’m kinda paranoid though because I’m not sure if she likes me or not and I don’t want to ask my bf because I’m a little shaky about asking about his parents. 😂