Husband smoking weed with best friend during covid 19. I’m concerned ..should i be?

Hi . So i need advice please. This post is not for people who want to be judgey about those who smoke weed. It’s legal.

Moving on..

My husband and i used to smoke weed together before i got pregnant now we can’t obviously because I’m pregnant. I know he misses doing that with me . My best friend smokes weed a lot. Her husband stopped smoking some time ago . It’s freaking covid 19. So we have been quarantined. Yesterday my bff came over with her daughter to help me while my husband was at work. And also our two daughters are close in age and missed each other so they played together. She kept asking me what time was he going to be home :? Initially it seemed like she wanted to make a mad dash out of there before he arrived back home. But then she waited until he got home. He cane in gave me a kiss (weird moment idk why but i felt like ..idk she felt uncomfortable about that or something idk weird feeling moment). Anyway, she goes talks to him in kitchen..and starts rolling up a blunt immediately. Now I’ve already told my husband that i really don’t want him passing the joint or the blunt with her or anyone at this time. Just in case the opportunity was to present itself, he was not to do it due to covid 19. We agreed on this. And what do they go out back and do together . The go smoke together. Initially I saw him roll up his own joint and go but when i came out there to check on them i saw them passing the joint back and forth. I was livid. Also i feel like smoking weed with the opposite sex can be an intimate act . But that’s just me. Why would my best friend wait around for my husband to get home to smoke with Him . I don’t know. And why he thot it was ok to break our agreement about smoking is even more concerning. I’m a bit of a hot head and tend to not trust people . So i need some advice about this , maybe how to approach it . I really don’t want to talk to her about it bc she has been trying to help plan a shower for me and supportive but don’t f with me family or health .