In our most vulnerable moments, it can be really easy to sink down to the point that we Google our partner's ex just to compare ourselves. It's silly, really. That person is an ex for a reason, and you partner is actively choosing to be with you now, so there isn't any reason to worry. But when the insecurities are insecuring and the ego is wheezing like a dis-inflated balloon, we might begin to tell ourselves otherwise. Throw in a mean-spirited mother-in-law who seems to favor your partner's previous lover, and you might actually start believing some anxiety-fueled fantasies about your partner's past.
Thankfully our protagonist in today's story was level-headed enough not to fall for this confidence-killing trap. It seems that her MIL was trying to goad her into feeling insecure, but she just ended up emphasizing her own insecurities about her son's relationships with other women. Now OP just has to decide whether to simply burn the scrapbook, burn bridges with her MIL, or both.
