Is it normal that i like sex relation with my ex bf?

afer 13 years i met back my ex-bf, who is married to one of my oldest school friends. 2 month ago, i met them both by chance in the nursery were our both baby are. we decide to gather on some week-end since our childrens have approx the same age and since we leave not far from each other. the first week end we gather we change smiles and some small discussion. the second time was friendly, we were jocking more and many times he was putting his hands on mine. no body knows about previous relation that was pure love only (no sex relation was applicable). Since one month he start calling me during the week day and invites me for a coffee during breaks, everything was normal till the thinks was expend faster, he was holding my hands often, give a lot of compliments and nice words enven more he gives me some fast frensh kisses and last time he putt his hand on my legs. i mention to him that it was wrong but deep inside me i was happy coz this bring back the old days and makes feel more younger. last week end we went both family to the beach where we have a smale house. at lunch i decide to go prepare the food in the kitchen keeping them all outside playing and sunbathing on the send when suddenly i felt someone is standing behind me than hugs me and ask if he can help me in something. i turned my head to discover that he was Ex. he kissed in my neck then in my month and tells me that he founds me very sexy, he putt his handson my breast and squeeze them then the other hand move downs to my twat. i couldn't protest and let him continue what he is doing, then i felt something grow tied my ass, he turned back to his side and kissed me deep into my month, i was still feeling his dick geeting hard and bigger when suddenly he push my head down to suck him. i obey and my make love very fast before someone catch us.