Susan says

aYes, you should be worried. The flings your husband’s had up to now haven’t impacted on your marriage, and so you’ve been able to handle them. This one clearly is impacting. It shows your husband is more involved in this affair than ever before. and it means you are more resentful than ever before. You need to challenge your husband, find out what’s going on, make it clear your marriage is under threat. There may be a crisis looming here – don’t just sit back and let it happen!