losing my virginity

I'm 16 and I lost my virginity 2 weeks ago with my boyfriend that I've been with for just under 6 months. His older sister knows we have done it because she gives me this weird look when I come downstairs but my mum doesn't. Me and my mum have an extremely close relationship and she has given me 'the talk' about 50 times since going out with my boyfriend but I don't know if I should tell her or not. She jokes about it saying things like "let me know when you need condoms" to see if I act weird or something. It's like she wants to know if I have but I feel like she'll judge me for it because we haven't been going out that long. I think she'll be fine about it but she keeps mentioning that "it's early days" so she makes me feel slutty about it. I dunno I just need some advice.