If she is still bowl wrapping and on the cool side she has not ovulated, once female ovulate they seek the hot spot.
Because you pair them does not mean that you will witness a lock every time especially if you disturb them to much, the bumps you are felling are likely follicles which get as big as golf bowls near ovulation.
Okay. If she's that close to ovulation would that mean I don't need to put him in with her anymore, or should I keep putting them together just to be safe?