Guy 1 or 2

Hello no negativity please just want opinions on the question I’m going to ask…

So on the 29th I was still bleeding abit from my period but had sex with guy 1 (one night stand). He did not cum inside of me.

Every date with the heart after that I have been having sex with my ex who has ejaculated inside of me every time.

My periods are 28 days. Everytime ive done an opk test in the months before hand (not this month as I wasn’t trying for a baby) it has been positive between day 15-16 of my cycle.

If I got pregnant this month would baby be guy 2s? I just want to clear my head because the chances are feeling very likely.

Guy 1 or 2?