Was dating a guy for about 3 months, and he was super weirdly close to his mother, and he told her everything. I was okay with this, because I'm very close to my mom and I tell her a lot too. But apparently not as much as my ex told his mother, because the first time I ever met her, she politely pulled me aside to ask me about a bump in my vagina her son had mentioned (she's a nurse, so he asked her for advice) she offered to check it out for me and make sure it's normal. I had no idea what bump she was talking about, so we called him because, wtf? First describing my privates to his mom, then her trying to inspect me? The bump was my cervix guys. She was still weirdly close to him and eventually he gave her my number and she would text me and call me just to "check up" on our relationship, asking me how we were doing, if we were being safe sexually (she never 100% believed I didn't have any weird diseases and that the bump he described really was my cervix) and I broke up with him not long after.
TL:DR, ex describes the inside of my vagina to his mom, tries to inspect it when I first meet her to make sure I'm clean. Gets weirdly interested in our sex life because she's convinced I'm going to give her son diseases. The bump is my cervix, and it's not contagious.