My partner (23M) of 8 months used to have drunk sex with a woman (23F) around 4 years ago, she was also sleeping with 2 other guys at the same time. Around this time she became pregnant and then got into a relationship with one of the guys she was sleeping with, he has been raising the child as his own ever since. Although she would tell my partner there was a chance the child could be his, he did ask for a DNA test at the time but she refused.
Now 4 years later, herself and her partner have split up and now she suddenly wants a DNA test with my partner to find out if he is really the dad. I am so upset about this as we have been happy and I feel it's so unfair she is doing this now because she single and he's in a happy relationship, as she used to really like him but he wasn't interested in having a relationship with her. I am scared if he is the father that it will change everything. He wants to to do the test as he said he doesn't think the child is his and wants to get her to leave him alone.
I really don't know what to do, should I stick by him? Please could I have some advice?