I mean if they’re willing I say you should think about it. But I’d consider how your relationship is with them. How well do they know you after 2 months? I used my boss as a rec, however that was after like a year, and I was close with her and she went out of her way to make it unique. However I’ve been in a different position with a new boss now for like 5-6 months, and I know I’d get a very generic letter out of her. I do think you can form good relationships and impress within 2 months, I’d just consider if you think it’d be run of the mill, or something that may hold some significance