Outercourse During Fertile Period? Is It Safe? We Were Playing

Outercourse during fertile period? Is it safe? We were playing around with both wearing our underwears she had first her orgasm while rubbing her pussy and then she gave me a handjob and I came and wiped it with tissue. She also wiped her hands and used alcohol and took a nap and I went to the comfort room and washed my genitals and urinated. After that we made out again wearing our underwears then she had orgasm again by rubbing and i grinded her with underwears on then I came on her tits. Is our situation safe?