Too tight

My fiancé had gone to Mexico to see his mother for about ten days. I'm going to say he's not the thickest girthiest person down there. He has a pleasurable size for me. He came back about 1wk and a half ago and when he came we had sex right away but he complained about pain on his private area claiming I was too tight for him to finish. Initially I was kinda happy to hear that since I've previously had two kids. I was feeling sex deprived since I was giving him time to heal. We then tried again 3 days later and he could barely finish saying I hurt him too much. For Mother's Day he fucked me so good! Then last night it happened again! I don't know what to do. I feel less of a woman since I can't please my man. Don't know if he's cheating on me or I'm actually hurting him. I've been tossing and turning all night. I slept on my side of the bed since I felt horrible. I just don't know how to take it or what to think about it. I need advice please!