How early is it to have sex after breakup?

My boyfriend and I were toghether for 5 months and officially in a relationship for almost 3 months.
My boyfriend and I went on a break almost two weeks back and I broke up with him 2 days back as I had been ghosted by him for 2-5 days now. I used those two weeks since the break to get over him and definitely cried a ton. My mind is made up and im convinced mans cheated on me and the fact that he never treated me well made me feel like he used me and it was like friends with benefits for the most part of it.

I met me previous friends with benefits after 5 months today and we were considering rekindling our shi again but he is nervous that its morally incorrect and I should give it a longer thought. Me on the other hand feels ready cause my mind doesn't see it as incorrect given how my ex treated me. I also barely seen my ex once a week which was like fuck and go and thats my scene with the friends with benefits too so I don't know rn.

I do tend to feel guilty after sex but i feel like there is no reason for me to not move on given my ex ghosted me and unfollowed me like our relationship never existed.

How early is it to have sex after breakup?
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